21130300312 has 32 divisors (see below), whose sum is σ = 43273861200. Its totient is φ = 9592950400.

The previous prime is 21130300291. The next prime is 21130300313. The reversal of 21130300312 is 21300303112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130300313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73987 + ... + 218482.

Almost surely, 2^21130300312 is an apocalyptic number.

21130300312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21130300312 is an abundant number, since it is smaller than the sum of its proper divisors (22143560888).

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

21130300312 is a wasteful number, since it uses less digits than its factorization.

21130300312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293307 (or 293303 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21130300312 its reverse (21300303112), we get a palindrome (42430603424).

The spelling of 21130300312 in words is "twenty-one billion, one hundred thirty million, three hundred thousand, three hundred twelve".