215100404121 has 16 divisors (see below), whose sum is σ = 294042426624. Its totient is φ = 139803070464.

The previous prime is 215100404111. The next prime is 215100404137. The reversal of 215100404121 is 121404001512.

It is not a de Polignac number, because 215100404121 - 2²² = 215096209817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215100404111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2931730 + ... + 3004203.

It is an arithmetic number, because the mean of its divisors is an integer number (18377651664).

Almost surely, 2^215100404121 is an apocalyptic number.

It is an amenable number.

215100404121 is a deficient number, since it is larger than the sum of its proper divisors (78942022503).

215100404121 is a wasteful number, since it uses less digits than its factorization.

215100404121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5936240.

The product of its (nonzero) digits is 320, while the sum is 21.

Adding to 215100404121 its reverse (121404001512), we get a palindrome (336504405633).

The spelling of 215100404121 in words is "two hundred fifteen billion, one hundred million, four hundred four thousand, one hundred twenty-one".