21431101300 has 72 divisors (see below), whose sum is σ = 55946488640. Its totient is φ = 6961075200.

The previous prime is 21431101291. The next prime is 21431101303. The reversal of 21431101300 is 310113412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21431101303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 792381 + ... + 818980.

Almost surely, 2^21431101300 is an apocalyptic number.

21431101300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21431101300 is an abundant number, since it is smaller than the sum of its proper divisors (34515387340).

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

21431101300 is a wasteful number, since it uses less digits than its factorization.

21431101300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611401 (or 1611394 counting only the distinct ones).

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

Adding to 21431101300 its reverse (310113412), we get a palindrome (21741214712).

The spelling of 21431101300 in words is "twenty-one billion, four hundred thirty-one million, one hundred one thousand, three hundred".