1225111131 has 6 divisors (see below), whose sum is σ = 1769604980. Its totient is φ = 816740748.

The previous prime is 1225111117. The next prime is 1225111141. The reversal of 1225111131 is 1311115221.

1225111131 is a `hidden beast` number, since 1 + 22 + 511 + 1 + 131 = 666.

It is not a de Polignac number, because 1225111131 - 2⁵ = 1225111099 is a prime.

It is a super-2 number, since 2×1225111131² = 3001794566600198322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225111141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68061721 + ... + 68061738.

Almost surely, 2^1225111131 is an apocalyptic number.

1225111131 is a deficient number, since it is larger than the sum of its proper divisors (544493849).

1225111131 is a wasteful number, since it uses less digits than its factorization.

1225111131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136123465 (or 136123462 counting only the distinct ones).

The product of its digits is 60, while the sum is 18.

The square root of 1225111131 is about 35001.5875497098. The cubic root of 1225111131 is about 1070.0198357169.

Adding to 1225111131 its reverse (1311115221), we get a palindrome (2536226352).

The spelling of 1225111131 in words is "one billion, two hundred twenty-five million, one hundred eleven thousand, one hundred thirty-one".