1216525444112 has 20 divisors (see below), whose sum is σ = 2571292416336. Its totient is φ = 552966110880.

The previous prime is 1216525444093. The next prime is 1216525444223. The reversal of 1216525444112 is 2114445256121.

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, 3456038018 + ... + 3456038369.

Almost surely, 2^{1216525444112} is an apocalyptic number.

It is an amenable number.

1216525444112 is an abundant number, since it is smaller than the sum of its proper divisors (1354766972224).

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

1216525444112 is a wasteful number, since it uses less digits than its factorization.

1216525444112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6912076406 (or 6912076400 counting only the distinct ones).

The product of its digits is 76800, while the sum is 38.

The spelling of 1216525444112 in words is "one trillion, two hundred sixteen billion, five hundred twenty-five million, four hundred forty-four thousand, one hundred twelve".