21310032200 has 24 divisors (see below), whose sum is σ = 49545825330. Its totient is φ = 8524012800.

The previous prime is 21310032199. The next prime is 21310032223. The reversal of 21310032200 is 223001312.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 8980594756 + 12329437444 = 94766^2 + 111038^2 .

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, 53274881 + ... + 53275280.

Almost surely, 2^21310032200 is an apocalyptic number.

21310032200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21310032200 is an abundant number, since it is smaller than the sum of its proper divisors (28235793130).

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

21310032200 is a wasteful number, since it uses less digits than its factorization.

21310032200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106550177 (or 106550168 counting only the distinct ones).

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

Adding to 21310032200 its reverse (223001312), we get a palindrome (21533033512).

The spelling of 21310032200 in words is "twenty-one billion, three hundred ten million, thirty-two thousand, two hundred".