21202102110 has 64 divisors (see below), whose sum is σ = 58226688000. Its totient is φ = 4840165632.

The previous prime is 21202102099. The next prime is 21202102111. The reversal of 21202102110 is 1120120212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202102111) 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, 107491 + ... + 232289.

It is an arithmetic number, because the mean of its divisors is an integer number (909792000).

Almost surely, 2^21202102110 is an apocalyptic number.

21202102110 is an abundant number, since it is smaller than the sum of its proper divisors (37024585890).

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

21202102110 is a wasteful number, since it uses less digits than its factorization.

21202102110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125625.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21202102110 its reverse (1120120212), we get a palindrome (22322222322).

The spelling of 21202102110 in words is "twenty-one billion, two hundred two million, one hundred two thousand, one hundred ten".