21021010122102 has 64 divisors (see below), whose sum is σ = 43781289108480. Its totient is φ = 6723815896224.

The previous prime is 21021010122089. The next prime is 21021010122109. The reversal of 21021010122102 is 20122101012012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021010122109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1091073 + ... + 6575139.

It is an arithmetic number, because the mean of its divisors is an integer number (684082642320).

Almost surely, 2^{21021010122102} is an apocalyptic number.

21021010122102 is an abundant number, since it is smaller than the sum of its proper divisors (22760278986378).

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

21021010122102 is a wasteful number, since it uses less digits than its factorization.

21021010122102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5484377.

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

Adding to 21021010122102 its reverse (20122101012012), we get a palindrome (41143111134114).

The spelling of 21021010122102 in words is "twenty-one trillion, twenty-one billion, ten million, one hundred twenty-two thousand, one hundred two".