215444122012 has 12 divisors (see below), whose sum is σ = 430888244080. Its totient is φ = 92333195136.

The previous prime is 215444122007. The next prime is 215444122057. The reversal of 215444122012 is 210221444512.

215444122012 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 7694432929 = 215444122012 / (2 + 1 + 5 + 4 + 4 + 4 + 1 + 2 + 2 + 0 + 1 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3847216437 + ... + 3847216492.

Almost surely, 2^215444122012 is an apocalyptic number.

It is an amenable number.

215444122012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

215444122012 is a wasteful number, since it uses less digits than its factorization.

215444122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7694432940 (or 7694432938 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

Adding to 215444122012 its reverse (210221444512), we get a palindrome (425665566524).

The spelling of 215444122012 in words is "two hundred fifteen billion, four hundred forty-four million, one hundred twenty-two thousand, twelve".