1200002021101 has 8 divisors (see below), whose sum is σ = 1292357197880. Its totient is φ = 1107653605632.

The previous prime is 1200002021081. The next prime is 1200002021171. The reversal of 1200002021101 is 1011202000021.

It can be written as a sum of positive squares in 4 ways, for example, as 118973945476 + 1081028075625 = 344926^2 + 1039725^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1200002021101 - 2⁵ = 1200002021069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200002021171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1318680 + ... + 2034433.

It is an arithmetic number, because the mean of its divisors is an integer number (161544649735).

Almost surely, 2^{1200002021101} is an apocalyptic number.

It is an amenable number.

1200002021101 is a deficient number, since it is larger than the sum of its proper divisors (92355176779).

1200002021101 is a wasteful number, since it uses less digits than its factorization.

1200002021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3380655.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1200002021101 its reverse (1011202000021), we get a palindrome (2211204021122).

The spelling of 1200002021101 in words is "one trillion, two hundred billion, two million, twenty-one thousand, one hundred one".