21030202110 has 64 divisors (see below), whose sum is σ = 51302937600. Its totient is φ = 5516314752.

The previous prime is 21030202103. The next prime is 21030202129. The reversal of 21030202110 is 1120203012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 621037 + ... + 654023.

It is an arithmetic number, because the mean of its divisors is an integer number (801608400).

Almost surely, 2^21030202110 is an apocalyptic number.

21030202110 is an abundant number, since it is smaller than the sum of its proper divisors (30272735490).

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

21030202110 is a wasteful number, since it uses less digits than its factorization.

21030202110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33345.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21030202110 its reverse (1120203012), we get a palindrome (22150405122).

The spelling of 21030202110 in words is "twenty-one billion, thirty million, two hundred two thousand, one hundred ten".