1231625952311 has 4 divisors (see below), whose sum is σ = 1231632091800. Its totient is φ = 1231619812824.

The previous prime is 1231625952283. The next prime is 1231625952341. The reversal of 1231625952311 is 1132595261321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1231625952311 - 2²⁶ = 1231558843447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231625952341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2758301 + ... + 3173558.

It is an arithmetic number, because the mean of its divisors is an integer number (307908022950).

Almost surely, 2^{1231625952311} is an apocalyptic number.

1231625952311 is a deficient number, since it is larger than the sum of its proper divisors (6139489).

1231625952311 is an equidigital number, since it uses as much as digits as its factorization.

1231625952311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6139488.

The product of its digits is 97200, while the sum is 41.

The spelling of 1231625952311 in words is "one trillion, two hundred thirty-one billion, six hundred twenty-five million, nine hundred fifty-two thousand, three hundred eleven".