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1200200012021 = 8680691382609
BaseRepresentation
bin10001011101110001011…
…111101101000011110101
311020201221000001202220002
4101131301133231003311
5124131002200341041
62315210403321045
7152466034530323
oct21356137550365
94221830052802
101200200012021
1142300268808a
12174734680185
1389241b7760a
1442138d10d13
152134754859b
hex117717ed0f5

1200200012021 has 4 divisors (see below), whose sum is σ = 1200202262700. Its totient is φ = 1200197761344.

The previous prime is 1200200011987. The next prime is 1200200012027. The reversal of 1200200012021 is 1202100020021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 655474828996 + 544725183025 = 809614^2 + 738055^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200200012021 - 238 = 925322105077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200200011993 and 1200200012011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200200012027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176765 + ... + 1559373.

It is an arithmetic number, because the mean of its divisors is an integer number (300050565675).

Almost surely, 21200200012021 is an apocalyptic number.

It is an amenable number.

1200200012021 is a deficient number, since it is larger than the sum of its proper divisors (2250679).

1200200012021 is an equidigital number, since it uses as much as digits as its factorization.

1200200012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2250678.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1200200012021 its reverse (1202100020021), we get a palindrome (2402300032042).

The spelling of 1200200012021 in words is "one trillion, two hundred billion, two hundred million, twelve thousand, twenty-one".

Divisors: 1 868069 1382609 1200200012021