123231201309 has 16 divisors (see below), whose sum is σ = 182759619840. Its totient is φ = 82066439520.

The previous prime is 123231201263. The next prime is 123231201323. The reversal of 123231201309 is 903102132321.

123231201309 is a `hidden beast` number, since 1 + 232 + 3 + 120 + 1 + 309 = 666.

It is not a de Polignac number, because 123231201309 - 2¹³ = 123231193117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123231201389) 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, 2410197 + ... + 2460794.

It is an arithmetic number, because the mean of its divisors is an integer number (11422476240).

Almost surely, 2^123231201309 is an apocalyptic number.

It is an amenable number.

123231201309 is a deficient number, since it is larger than the sum of its proper divisors (59528418531).

123231201309 is an equidigital number, since it uses as much as digits as its factorization.

123231201309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4871937 (or 4871931 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The spelling of 123231201309 in words is "one hundred twenty-three billion, two hundred thirty-one million, two hundred one thousand, three hundred nine".