123131403201 has 4 divisors (see below), whose sum is σ = 164175204272. Its totient is φ = 82087602132.

The previous prime is 123131403191. The next prime is 123131403247. The reversal of 123131403201 is 102304131321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 123131403201 - 2¹⁴ = 123131386817 is a prime.

It is a super-2 number, since 2×123131403201² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123131403001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20521900531 + ... + 20521900536.

It is an arithmetic number, because the mean of its divisors is an integer number (41043801068).

Almost surely, 2^123131403201 is an apocalyptic number.

It is an amenable number.

123131403201 is a deficient number, since it is larger than the sum of its proper divisors (41043801071).

123131403201 is an equidigital number, since it uses as much as digits as its factorization.

123131403201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41043801070.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 123131403201 its reverse (102304131321), we get a palindrome (225435534522).

The spelling of 123131403201 in words is "one hundred twenty-three billion, one hundred thirty-one million, four hundred three thousand, two hundred one".