215042115121 has 8 divisors (see below), whose sum is σ = 234165643200. Its totient is φ = 196699139280.

The previous prime is 215042115089. The next prime is 215042115139. The reversal of 215042115121 is 121511240512.

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

It is a cyclic number.

It is not a de Polignac number, because 215042115121 - 2⁵ = 215042115089 is a prime.

It is a super-2 number, since 2×215042115121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215042115161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195137485 + ... + 195138586.

It is an arithmetic number, because the mean of its divisors is an integer number (29270705400).

Almost surely, 2^215042115121 is an apocalyptic number.

It is an amenable number.

215042115121 is a deficient number, since it is larger than the sum of its proper divisors (19123528079).

215042115121 is a wasteful number, since it uses less digits than its factorization.

215042115121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390276119.

The product of its (nonzero) digits is 800, while the sum is 25.

Adding to 215042115121 its reverse (121511240512), we get a palindrome (336553355633).

The spelling of 215042115121 in words is "two hundred fifteen billion, forty-two million, one hundred fifteen thousand, one hundred twenty-one".