1216525444124 has 12 divisors (see below), whose sum is σ = 2128927256400. Its totient is φ = 608260513728.

The previous prime is 1216525444093. The next prime is 1216525444223. The reversal of 1216525444124 is 4214445256121.

It is a super-2 number, since 2×1216525444124² (a number of 25 digits) contains 22 as substring.

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, 1816217 + ... + 2394095.

It is an arithmetic number, because the mean of its divisors is an integer number (177410604700).

Almost surely, 2^{1216525444124} is an apocalyptic number.

It is an amenable number.

1216525444124 is a deficient number, since it is larger than the sum of its proper divisors (912401812276).

1216525444124 is a wasteful number, since it uses less digits than its factorization.

1216525444124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104172 (or 1104170 counting only the distinct ones).

The product of its digits is 307200, while the sum is 41.

The spelling of 1216525444124 in words is "one trillion, two hundred sixteen billion, five hundred twenty-five million, four hundred forty-four thousand, one hundred twenty-four".