21213010600 has 24 divisors (see below), whose sum is σ = 49320250110. Its totient is φ = 8485204160.

The previous prime is 21213010589. The next prime is 21213010657. The reversal of 21213010600 is 601031212.

It can be written as a sum of positive squares in 3 ways, for example, as 14174807364 + 7038203236 = 119058^2 + 83894^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53032327 + ... + 53032726.

Almost surely, 2^21213010600 is an apocalyptic number.

21213010600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21213010600 is an abundant number, since it is smaller than the sum of its proper divisors (28107239510).

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

21213010600 is a wasteful number, since it uses less digits than its factorization.

21213010600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106065069 (or 106065060 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21213010600 its reverse (601031212), we get a palindrome (21814041812).

The spelling of 21213010600 in words is "twenty-one billion, two hundred thirteen million, ten thousand, six hundred".