2131311234225 has 12 divisors (see below), whose sum is σ = 3523767907376. Its totient is φ = 1136699324880.

The previous prime is 2131311234197. The next prime is 2131311234229. The reversal of 2131311234225 is 5224321131312.

It is not a de Polignac number, because 2131311234225 - 2⁵ = 2131311234193 is a prime.

It is a super-2 number, since 2×2131311234225² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2131311234192 and 2131311234201.

It is not an unprimeable number, because it can be changed into a prime (2131311234229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14208741487 + ... + 14208741636.

Almost surely, 2^{2131311234225} is an apocalyptic number.

2131311234225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2131311234225 is a deficient number, since it is larger than the sum of its proper divisors (1392456673151).

2131311234225 is a wasteful number, since it uses less digits than its factorization.

2131311234225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28417483136 (or 28417483131 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

Adding to 2131311234225 its reverse (5224321131312), we get a palindrome (7355632365537).

The spelling of 2131311234225 in words is "two trillion, one hundred thirty-one billion, three hundred eleven million, two hundred thirty-four thousand, two hundred twenty-five".