21220102020102 has 16 divisors (see below), whose sum is σ = 42491522313792. Its totient is φ = 7064814294440.

The previous prime is 21220102020067. The next prime is 21220102020179. The reversal of 21220102020102 is 20102020102212.

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, 2138256024 + ... + 2138265947.

It is an arithmetic number, because the mean of its divisors is an integer number (2655720144612).

Almost surely, 2^{21220102020102} is an apocalyptic number.

21220102020102 is an abundant number, since it is smaller than the sum of its proper divisors (21271420293690).

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

21220102020102 is a wasteful number, since it uses less digits than its factorization.

21220102020102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4276522803.

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

Adding to 21220102020102 its reverse (20102020102212), we get a palindrome (41322122122314).

It can be divided in two parts, 212 and 20102020102, that multiplied together give a palindrome (4261628261624).

The spelling of 21220102020102 in words is "twenty-one trillion, two hundred twenty billion, one hundred two million, twenty thousand, one hundred two".