21700545070127 has 24 divisors (see below), whose sum is σ = 27272852630688. Its totient is φ = 16901660286720.

The previous prime is 21700545070109. The next prime is 21700545070147. The reversal of 21700545070127 is 72107054500712.

It is not a de Polignac number, because 21700545070127 - 2⁸ = 21700545069871 is a prime.

It is a super-2 number, since 2×21700545070127² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21700545070147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4126358 + ... + 7773539.

It is an arithmetic number, because the mean of its divisors is an integer number (1136368859612).

Almost surely, 2^{21700545070127} is an apocalyptic number.

21700545070127 is a deficient number, since it is larger than the sum of its proper divisors (5572307560561).

21700545070127 is a wasteful number, since it uses less digits than its factorization.

21700545070127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11902079 (or 11902068 counting only the distinct ones).

The product of its (nonzero) digits is 137200, while the sum is 41.

Adding to 21700545070127 its reverse (72107054500712), we get a palindrome (93807599570839).

The spelling of 21700545070127 in words is "twenty-one trillion, seven hundred billion, five hundred forty-five million, seventy thousand, one hundred twenty-seven".