21051057864119 has 12 divisors (see below), whose sum is σ = 22223843836704. Its totient is φ = 19937252716992.

The previous prime is 21051057864097. The next prime is 21051057864143. The reversal of 21051057864119 is 91146875015012.

It is not a de Polignac number, because 21051057864119 - 2¹⁶ = 21051057798583 is a prime.

It is a super-2 number, since 2×21051057864119² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21051057864149) 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, 7327922 + ... + 9787775.

It is an arithmetic number, because the mean of its divisors is an integer number (1851986986392).

Almost surely, 2^{21051057864119} is an apocalyptic number.

21051057864119 is a deficient number, since it is larger than the sum of its proper divisors (1172785972585).

21051057864119 is a wasteful number, since it uses less digits than its factorization.

21051057864119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17119142 (or 17119123 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 50.

The spelling of 21051057864119 in words is "twenty-one trillion, fifty-one billion, fifty-seven million, eight hundred sixty-four thousand, one hundred nineteen".