215120132121 has 8 divisors (see below), whose sum is σ = 286830692064. Its totient is φ = 143411496800.

The previous prime is 215120132119. The next prime is 215120132159. The reversal of 215120132121 is 121231021512.

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 215120132121 - 2¹ = 215120132119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215120132321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196251 + ... + 684656.

It is an arithmetic number, because the mean of its divisors is an integer number (35853836508).

Almost surely, 2^215120132121 is an apocalyptic number.

It is an amenable number.

215120132121 is a deficient number, since it is larger than the sum of its proper divisors (71710559943).

215120132121 is an equidigital number, since it uses as much as digits as its factorization.

215120132121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962311.

The product of its (nonzero) digits is 240, while the sum is 21.

Adding to 215120132121 its reverse (121231021512), we get a palindrome (336351153633).

The spelling of 215120132121 in words is "two hundred fifteen billion, one hundred twenty million, one hundred thirty-two thousand, one hundred twenty-one".