21121021020002 has 32 divisors (see below), whose sum is σ = 32977201489920. Its totient is φ = 10137233514240.

The previous prime is 21121021019983. The next prime is 21121021020019. The reversal of 21121021020002 is 20002012012112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4595399 + ... + 7959882.

It is an arithmetic number, because the mean of its divisors is an integer number (1030537546560).

Almost surely, 2^{21121021020002} is an apocalyptic number.

21121021020002 is a deficient number, since it is larger than the sum of its proper divisors (11856180469918).

21121021020002 is a wasteful number, since it uses less digits than its factorization.

21121021020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12555626.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21121021020002 its reverse (20002012012112), we get a palindrome (41123033032114).

The spelling of 21121021020002 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-one million, twenty thousand, two".