21221101002102 has 16 divisors (see below), whose sum is σ = 42538881285120. Its totient is φ = 7057587120552.

The previous prime is 21221101002077. The next prime is 21221101002131. The reversal of 21221101002102 is 20120010112212.

It is a congruent number.

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, 4028300518 + ... + 4028305785.

It is an arithmetic number, because the mean of its divisors is an integer number (2658680080320).

Almost surely, 2^{21221101002102} is an apocalyptic number.

21221101002102 is an abundant number, since it is smaller than the sum of its proper divisors (21317780283018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21221101002102 is a wasteful number, since it uses less digits than its factorization.

21221101002102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8056606747.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21221101002102 its reverse (20120010112212), we get a palindrome (41341111114314).

The spelling of 21221101002102 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred one million, two thousand, one hundred two".