1200200120021 has 8 divisors (see below), whose sum is σ = 1371875019264. Its totient is φ = 1028579655600.

The previous prime is 1200200119981. The next prime is 1200200120033. The reversal of 1200200120021 is 1200210020021.

It is a happy number.

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

It is not a de Polignac number, because 1200200120021 - 2²⁶ = 1200133011157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200200119984 and 1200200120011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200200123021) 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, 13561445 + ... + 13649658.

It is an arithmetic number, because the mean of its divisors is an integer number (171484377408).

Almost surely, 2^{1200200120021} is an apocalyptic number.

It is an amenable number.

1200200120021 is a deficient number, since it is larger than the sum of its proper divisors (171674899243).

1200200120021 is an equidigital number, since it uses as much as digits as its factorization.

1200200120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27217411.

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

Adding to 1200200120021 its reverse (1200210020021), we get a palindrome (2400410140042).

The spelling of 1200200120021 in words is "one trillion, two hundred billion, two hundred million, one hundred twenty thousand, twenty-one".