1012111315225 has 12 divisors (see below), whose sum is σ = 1256162110524. Its totient is φ = 808950936320.

The previous prime is 1012111315219. The next prime is 1012111315231. The reversal of 1012111315225 is 5225131112101.

It is an interprime number because it is at equal distance from previous prime (1012111315219) and next prime (1012111315231).

It can be written as a sum of positive squares in 6 ways, for example, as 71372328336 + 940738986889 = 267156^2 + 969917^2 .

It is not a de Polignac number, because 1012111315225 - 2⁷ = 1012111315097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1012111315225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18424924 + ... + 18479773.

It is an arithmetic number, because the mean of its divisors is an integer number (104680175877).

Almost surely, 2^{1012111315225} is an apocalyptic number.

It is an amenable number.

1012111315225 is a deficient number, since it is larger than the sum of its proper divisors (244050795299).

1012111315225 is a wasteful number, since it uses less digits than its factorization.

1012111315225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36905804 (or 36905799 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 25.

Adding to 1012111315225 its reverse (5225131112101), we get a palindrome (6237242427326).

The spelling of 1012111315225 in words is "one trillion, twelve billion, one hundred eleven million, three hundred fifteen thousand, two hundred twenty-five".