21210121022102 has 32 divisors (see below), whose sum is σ = 34948627787520. Its totient is φ = 9609282793440.

The previous prime is 21210121022071. The next prime is 21210121022117. The reversal of 21210121022102 is 20122012101212.

It is a congruent number.

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, 9632852 + ... + 11628072.

It is an arithmetic number, because the mean of its divisors is an integer number (1092144618360).

Almost surely, 2^{21210121022102} is an apocalyptic number.

21210121022102 is a deficient number, since it is larger than the sum of its proper divisors (13738506765418).

21210121022102 is a wasteful number, since it uses less digits than its factorization.

21210121022102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007428.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21210121022102 its reverse (20122012101212), we get a palindrome (41332133123314).

The spelling of 21210121022102 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty-one million, twenty-two thousand, one hundred two".