21351266215312 has 40 divisors (see below), whose sum is σ = 45166832343072. Its totient is φ = 9696944736000.

The previous prime is 21351266215291. The next prime is 21351266215337.

21351266215312 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50892189 + ... + 51310012.

Almost surely, 2^{21351266215312} is an apocalyptic number.

21351266215312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21351266215312 is an abundant number, since it is smaller than the sum of its proper divisors (23815566127760).

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

21351266215312 is a wasteful number, since it uses less digits than its factorization.

21351266215312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102203407 (or 102203401 counting only the distinct ones).

The product of its digits is 129600, while the sum is 40.

The spelling of 21351266215312 in words is "twenty-one trillion, three hundred fifty-one billion, two hundred sixty-six million, two hundred fifteen thousand, three hundred twelve".