12401157231 has 12 divisors (see below), whose sum is σ = 17917448640. Its totient is φ = 8265284640.

The previous prime is 12401157217. The next prime is 12401157257. The reversal of 12401157231 is 13275110421.

12401157231 is a `hidden beast` number, since 12 + 40 + 11 + 572 + 31 = 666.

It is not a de Polignac number, because 12401157231 - 2¹⁴ = 12401140847 is a prime.

It is a super-2 number, since 2×12401157231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12401157195 and 12401157204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12401157031) 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, 142591 + ... + 212448.

It is an arithmetic number, because the mean of its divisors is an integer number (1493120720).

Almost surely, 2^12401157231 is an apocalyptic number.

12401157231 is a deficient number, since it is larger than the sum of its proper divisors (5516291409).

12401157231 is a wasteful number, since it uses less digits than its factorization.

12401157231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358926 (or 358923 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

Adding to 12401157231 its reverse (13275110421), we get a palindrome (25676267652).

The spelling of 12401157231 in words is "twelve billion, four hundred one million, one hundred fifty-seven thousand, two hundred thirty-one".