1200021121201 has 32 divisors (see below), whose sum is σ = 1465448785920. Its totient is φ = 959733878400.

The previous prime is 1200021121147. The next prime is 1200021121259. The reversal of 1200021121201 is 1021211200021.

It is a cyclic number.

It is not a de Polignac number, because 1200021121201 - 2²⁵ = 1199987566769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200021151201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73338261 + ... + 73354621.

It is an arithmetic number, because the mean of its divisors is an integer number (45795274560).

Almost surely, 2^{1200021121201} is an apocalyptic number.

It is an amenable number.

1200021121201 is a deficient number, since it is larger than the sum of its proper divisors (265427664719).

1200021121201 is a wasteful number, since it uses less digits than its factorization.

1200021121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24685.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1200021121201 its reverse (1021211200021), we get a palindrome (2221232321222).

The spelling of 1200021121201 in words is "one trillion, two hundred billion, twenty-one million, one hundred twenty-one thousand, two hundred one".