21230103200 has 72 divisors (see below), whose sum is σ = 54876729852. Its totient is φ = 7992504320.

The previous prime is 21230103179. The next prime is 21230103211. The reversal of 21230103200 is 230103212.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 14303203216 + 6926899984 = 119596^2 + 83228^2 .

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, 766919 + ... + 794118.

Almost surely, 2^21230103200 is an apocalyptic number.

21230103200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21230103200 is an abundant number, since it is smaller than the sum of its proper divisors (33646626652).

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

21230103200 is a wasteful number, since it uses less digits than its factorization.

21230103200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561074 (or 1561061 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21230103200 its reverse (230103212), we get a palindrome (21460206412).

The spelling of 21230103200 in words is "twenty-one billion, two hundred thirty million, one hundred three thousand, two hundred".