21220002102 has 32 divisors (see below), whose sum is σ = 45710568288. Its totient is φ = 6528381696.

The previous prime is 21220002073. The next prime is 21220002113. The reversal of 21220002102 is 20120002212.

21220002102 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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, 867228 + ... + 891360.

It is an arithmetic number, because the mean of its divisors is an integer number (1428455259).

Almost surely, 2^21220002102 is an apocalyptic number.

21220002102 is an abundant number, since it is smaller than the sum of its proper divisors (24490566186).

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

21220002102 is a wasteful number, since it uses less digits than its factorization.

21220002102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35424.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21220002102 its reverse (20120002212), we get a palindrome (41340004314).

The spelling of 21220002102 in words is "twenty-one billion, two hundred twenty million, two thousand, one hundred two".