21120001200002 has 16 divisors (see below), whose sum is σ = 31760481550200. Its totient is φ = 10533175158528.

The previous prime is 21120001199993. The next prime is 21120001200019. The reversal of 21120001200002 is 20000210002112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13815635529721 + 7304365670281 = 3716939^2 + 2702659^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40406624 + ... + 40925972.

Almost surely, 2^{21120001200002} is an apocalyptic number.

21120001200002 is a deficient number, since it is larger than the sum of its proper divisors (10640480350198).

21120001200002 is a wasteful number, since it uses less digits than its factorization.

21120001200002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570965.

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

Adding to 21120001200002 its reverse (20000210002112), we get a palindrome (41120211202114).

The spelling of 21120001200002 in words is "twenty-one trillion, one hundred twenty billion, one million, two hundred thousand, two".