123031400225431 has 16 divisors (see below), whose sum is σ = 127413277200000. Its totient is φ = 118658873668608.

The previous prime is 123031400225423. The next prime is 123031400225443. The reversal of 123031400225431 is 134522004130321.

It is a cyclic number.

It is not a de Polignac number, because 123031400225431 - 2³ = 123031400225423 is a prime.

It is a super-2 number, since 2×123031400225431² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123031400225393 and 123031400225402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123031400225131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122906461 + ... + 123903433.

It is an arithmetic number, because the mean of its divisors is an integer number (7963329825000).

Almost surely, 2^{123031400225431} is an apocalyptic number.

123031400225431 is a deficient number, since it is larger than the sum of its proper divisors (4381876974569).

123031400225431 is a wasteful number, since it uses less digits than its factorization.

123031400225431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001658.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 123031400225431 its reverse (134522004130321), we get a palindrome (257553404355752).

The spelling of 123031400225431 in words is "one hundred twenty-three trillion, thirty-one billion, four hundred million, two hundred twenty-five thousand, four hundred thirty-one".