21210002022102 has 16 divisors (see below), whose sum is σ = 43115413947312. Its totient is φ = 6954099023520.

The previous prime is 21210002022067. The next prime is 21210002022109. The reversal of 21210002022102 is 20122020001212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210002022109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28975412233 + ... + 28975412964.

It is an arithmetic number, because the mean of its divisors is an integer number (2694713371707).

Almost surely, 2^{21210002022102} is an apocalyptic number.

21210002022102 is an abundant number, since it is smaller than the sum of its proper divisors (21905411925210).

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

21210002022102 is a wasteful number, since it uses less digits than its factorization.

21210002022102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57950825263.

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

Adding to 21210002022102 its reverse (20122020001212), we get a palindrome (41332022023314).

The spelling of 21210002022102 in words is "twenty-one trillion, two hundred ten billion, two million, twenty-two thousand, one hundred two".