21102020212002 has 16 divisors (see below), whose sum is σ = 42204301270560. Its totient is φ = 7033963262912.

The previous prime is 21102020211967. The next prime is 21102020212043. The reversal of 21102020212002 is 20021202020112.

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, 9808983 + ... + 11765210.

It is an arithmetic number, because the mean of its divisors is an integer number (2637768829410).

Almost surely, 2^{21102020212002} is an apocalyptic number.

21102020212002 is an abundant number, since it is smaller than the sum of its proper divisors (21102281058558).

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

21102020212002 is a wasteful number, since it uses less digits than its factorization.

21102020212002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21737217.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21102020212002 its reverse (20021202020112), we get a palindrome (41123222232114).

The spelling of 21102020212002 in words is "twenty-one trillion, one hundred two billion, twenty million, two hundred twelve thousand, two".