215151100122 has 48 divisors (see below), whose sum is σ = 530000081280. Its totient is φ = 57855756672.

The previous prime is 215151100117. The next prime is 215151100159. The reversal of 215151100122 is 221001151512.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21518722 + ... + 21528717.

It is an arithmetic number, because the mean of its divisors is an integer number (11041668360).

Almost surely, 2^215151100122 is an apocalyptic number.

215151100122 is an abundant number, since it is smaller than the sum of its proper divisors (314848981158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215151100122 is a wasteful number, since it uses less digits than its factorization.

215151100122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43047475 (or 43047468 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 21.

Adding to 215151100122 its reverse (221001151512), we get a palindrome (436152251634).

The spelling of 215151100122 in words is "two hundred fifteen billion, one hundred fifty-one million, one hundred thousand, one hundred twenty-two".