1125924721216 has 21 divisors (see below), whose sum is σ = 2234273713689. Its totient is φ = 562958116224.

The previous prime is 1125924721199. The next prime is 1125924721231. The reversal of 1125924721216 is 6121274295211.

The square root of 1125924721216 is 1061096.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 831745600 + 1125092975616 = 28840^2 + 1060704^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 8422450 + ... + 8555086.

Almost surely, 2^{1125924721216} is an apocalyptic number.

1125924721216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1125924721216 is the 1061096-th square number.

It is an amenable number.

1125924721216 is a deficient number, since it is larger than the sum of its proper divisors (1108348992473).

1125924721216 is an frugal number, since it uses more digits than its factorization.

1125924721216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265286 (or 132639 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The spelling of 1125924721216 in words is "one trillion, one hundred twenty-five billion, nine hundred twenty-four million, seven hundred twenty-one thousand, two hundred sixteen".