21612712335 has 16 divisors (see below), whose sum is σ = 36083833344. Its totient is φ = 11025615392.

The previous prime is 21612712309. The next prime is 21612712361. The reversal of 21612712335 is 53321721612.

It is an interprime number because it is at equal distance from previous prime (21612712309) and next prime (21612712361).

It is a cyclic number.

It is not a de Polignac number, because 21612712335 - 2⁶ = 21612712271 is a prime.

It is a super-2 number, since 2×21612712335² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21612712296 and 21612712305.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31322427 + ... + 31323116.

It is an arithmetic number, because the mean of its divisors is an integer number (2255239584).

Almost surely, 2^21612712335 is an apocalyptic number.

21612712335 is a deficient number, since it is larger than the sum of its proper divisors (14471121009).

21612712335 is a wasteful number, since it uses less digits than its factorization.

21612712335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62645574.

The product of its digits is 15120, while the sum is 33.

The spelling of 21612712335 in words is "twenty-one billion, six hundred twelve million, seven hundred twelve thousand, three hundred thirty-five".