111025572025 has 27 divisors (see below), whose sum is σ = 139236507471. Its totient is φ = 87822175440.

The previous prime is 111025572023. The next prime is 111025572041. The reversal of 111025572025 is 520275520111.

It is a happy number.

The square root of 111025572025 is 333205.

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., 39969205929 + 71056366096 = 199923^2 + 266564^2 .

It is not a de Polignac number, because 111025572025 - 2¹ = 111025572023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111025572023) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 171600252 + ... + 171600898.

Almost surely, 2^111025572025 is an apocalyptic number.

111025572025 is the 333205-th square number.

111025572025 is the 166603-rd centered octagonal number.

It is an amenable number.

111025572025 is a deficient number, since it is larger than the sum of its proper divisors (28210935446).

111025572025 is an frugal number, since it uses more digits than its factorization.

111025572025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510 (or 755 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 31.

The spelling of 111025572025 in words is "one hundred eleven billion, twenty-five million, five hundred seventy-two thousand, twenty-five".