21203310110 has 32 divisors (see below), whose sum is σ = 40182307200. Its totient is φ = 8033415840.

The previous prime is 21203310101. The next prime is 21203310131. The reversal of 21203310110 is 1101330212.

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, 1911761 + ... + 1922819.

It is an arithmetic number, because the mean of its divisors is an integer number (1255697100).

Almost surely, 2^21203310110 is an apocalyptic number.

21203310110 is a deficient number, since it is larger than the sum of its proper divisors (18978997090).

21203310110 is a wasteful number, since it uses less digits than its factorization.

21203310110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21176.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21203310110 its reverse (1101330212), we get a palindrome (22304640322).

The spelling of 21203310110 in words is "twenty-one billion, two hundred three million, three hundred ten thousand, one hundred ten".