1312122225 has 12 divisors (see below), whose sum is σ = 2169375536. Its totient is φ = 699798480.

The previous prime is 1312122211. The next prime is 1312122233. The reversal of 1312122225 is 5222212131.

It is not a de Polignac number, because 1312122225 - 2²³ = 1303733617 is a prime.

It is a Duffinian number.

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, 8747407 + ... + 8747556.

Almost surely, 2^1312122225 is an apocalyptic number.

1312122225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1312122225 is a deficient number, since it is larger than the sum of its proper divisors (857253311).

1312122225 is a wasteful number, since it uses less digits than its factorization.

1312122225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17494976 (or 17494971 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 1312122225 is about 36223.2276999165. The cubic root of 1312122225 is about 1094.7747289972.

Adding to 1312122225 its reverse (5222212131), we get a palindrome (6534334356).

The spelling of 1312122225 in words is "one billion, three hundred twelve million, one hundred twenty-two thousand, two hundred twenty-five".