21103331300 has 36 divisors (see below), whose sum is σ = 45851010660. Its totient is φ = 8430865920.

The previous prime is 21103331297. The next prime is 21103331341. The reversal of 21103331300 is 313330112.

It can be written as a sum of positive squares in 6 ways, for example, as 3444736 + 21099886564 = 1856^2 + 145258^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49529 + ... + 211328.

It is an arithmetic number, because the mean of its divisors is an integer number (1273639185).

Almost surely, 2^21103331300 is an apocalyptic number.

21103331300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21103331300 is an abundant number, since it is smaller than the sum of its proper divisors (24747679360).

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

21103331300 is a wasteful number, since it uses less digits than its factorization.

21103331300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261680 (or 261673 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 21103331300 its reverse (313330112), we get a palindrome (21416661412).

The spelling of 21103331300 in words is "twenty-one billion, one hundred three million, three hundred thirty-one thousand, three hundred".