21612572075134 has 16 divisors (see below), whose sum is σ = 32428297373472. Its totient is φ = 10803139882848.

The previous prime is 21612572075053. The next prime is 21612572075141. The reversal of 21612572075134 is 43157027521612.

It is a super-2 number, since 2×21612572075134² (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 in 7 ways as a sum of consecutive naturals, for example, 209102932 + ... + 209206264.

It is an arithmetic number, because the mean of its divisors is an integer number (2026768585842).

Almost surely, 2^{21612572075134} is an apocalyptic number.

21612572075134 is a deficient number, since it is larger than the sum of its proper divisors (10815725298338).

21612572075134 is a wasteful number, since it uses less digits than its factorization.

21612572075134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132771.

The product of its (nonzero) digits is 705600, while the sum is 46.

Adding to 21612572075134 its reverse (43157027521612), we get a palindrome (64769599596746).

The spelling of 21612572075134 in words is "twenty-one trillion, six hundred twelve billion, five hundred seventy-two million, seventy-five thousand, one hundred thirty-four".