215020406022111 has 24 divisors (see below), whose sum is σ = 311173608301920. Its totient is φ = 143075337494976.

The previous prime is 215020406022109. The next prime is 215020406022127. The reversal of 215020406022111 is 111220604020512.

It is a happy number.

215020406022111 is a `hidden beast` number, since 2 + 1 + 5 + 0 + 2 + 0 + 40 + 602 + 2 + 1 + 11 = 666.

It is not a de Polignac number, because 215020406022111 - 2¹ = 215020406022109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215020406022911) 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, 48345966 + ... + 52605828.

It is an arithmetic number, because the mean of its divisors is an integer number (12965567012580).

Almost surely, 2^{215020406022111} is an apocalyptic number.

215020406022111 is a deficient number, since it is larger than the sum of its proper divisors (96153202279809).

215020406022111 is a wasteful number, since it uses less digits than its factorization.

215020406022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4270495 (or 4270492 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The spelling of 215020406022111 in words is "two hundred fifteen trillion, twenty billion, four hundred six million, twenty-two thousand, one hundred eleven".