21222210102 has 32 divisors (see below), whose sum is σ = 43649954304. Its totient is φ = 6873660000.

The previous prime is 21222210089. The next prime is 21222210133. The reversal of 21222210102 is 20101222212.

21222210102 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21222210102² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103077 + ... + 230367.

It is an arithmetic number, because the mean of its divisors is an integer number (1364061072).

Almost surely, 2^21222210102 is an apocalyptic number.

21222210102 is an abundant number, since it is smaller than the sum of its proper divisors (22427744202).

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

21222210102 is a wasteful number, since it uses less digits than its factorization.

21222210102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128084.

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

Adding to 21222210102 its reverse (20101222212), we get a palindrome (41323432314).

The spelling of 21222210102 in words is "twenty-one billion, two hundred twenty-two million, two hundred ten thousand, one hundred two".