21021300111312 has 60 divisors (see below), whose sum is σ = 60082155656640. Its totient is φ = 6858012800064.

The previous prime is 21021300111283. The next prime is 21021300111337. The reversal of 21021300111312 is 21311100312012.

21021300111312 is a `hidden beast` number, since 21 + 0 + 21 + 300 + 1 + 11 + 312 = 666.

It is a super-2 number, since 2×21021300111312² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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, 1552985262 + ... + 1552998797.

It is an arithmetic number, because the mean of its divisors is an integer number (1001369260944).

Almost surely, 2^{21021300111312} is an apocalyptic number.

It is an amenable number.

21021300111312 is an abundant number, since it is smaller than the sum of its proper divisors (39060855545328).

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

21021300111312 is a wasteful number, since it uses less digits than its factorization.

21021300111312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3105984120 (or 3105984111 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21021300111312 its reverse (21311100312012), we get a palindrome (42332400423324).

The spelling of 21021300111312 in words is "twenty-one trillion, twenty-one billion, three hundred million, one hundred eleven thousand, three hundred twelve".