21213366011512 has 8 divisors (see below), whose sum is σ = 39775061271600. Its totient is φ = 10606683005752.

The previous prime is 21213366011491. The next prime is 21213366011549. The reversal of 21213366011512 is 21511066331212.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21213366011512² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1325835375712 + ... + 1325835375727.

It is an arithmetic number, because the mean of its divisors is an integer number (4971882658950).

Almost surely, 2^{21213366011512} is an apocalyptic number.

It is an amenable number.

21213366011512 is a deficient number, since it is larger than the sum of its proper divisors (18561695260088).

21213366011512 is a wasteful number, since it uses less digits than its factorization.

21213366011512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2651670751445 (or 2651670751441 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 21213366011512 in words is "twenty-one trillion, two hundred thirteen billion, three hundred sixty-six million, eleven thousand, five hundred twelve".