21005214151113 has 12 divisors (see below), whose sum is σ = 30476922577920. Its totient is φ = 13940680242456.

The previous prime is 21005214151069. The next prime is 21005214151133. The reversal of 21005214151113 is 31115141250012.

21005214151113 is a `hidden beast` number, since 2 + 1 + 0 + 0 + 5 + 2 + 141 + 511 + 1 + 3 = 666.

It is not a de Polignac number, because 21005214151113 - 2¹⁸ = 21005213888969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21005214151133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5232986073 + ... + 5232990086.

It is an arithmetic number, because the mean of its divisors is an integer number (2539743548160).

Almost surely, 2^{21005214151113} is an apocalyptic number.

It is an amenable number.

21005214151113 is a deficient number, since it is larger than the sum of its proper divisors (9471708426807).

21005214151113 is a wasteful number, since it uses less digits than its factorization.

21005214151113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10465976388 (or 10465976385 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

The spelling of 21005214151113 in words is "twenty-one trillion, five billion, two hundred fourteen million, one hundred fifty-one thousand, one hundred thirteen".