21612572357114 has 8 divisors (see below), whose sum is σ = 32478782490228. Its totient is φ = 10786311527040.

The previous prime is 21612572357113. The next prime is 21612572357143. The reversal of 21612572357114 is 41175327521612.

It can be written as a sum of positive squares in 2 ways, for example, as 19832922975889 + 1779649381225 = 4453417^2 + 1334035^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21612572357113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9987324407 + ... + 9987326570.

Almost surely, 2^{21612572357114} is an apocalyptic number.

21612572357114 is a deficient number, since it is larger than the sum of its proper divisors (10866210133114).

21612572357114 is a wasteful number, since it uses less digits than its factorization.

21612572357114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19974651520.

The product of its digits is 705600, while the sum is 47.

Adding to 21612572357114 its reverse (41175327521612), we get a palindrome (62787899878726).

The spelling of 21612572357114 in words is "twenty-one trillion, six hundred twelve billion, five hundred seventy-two million, three hundred fifty-seven thousand, one hundred fourteen".