431020040000123 has 4 divisors (see below), whose sum is σ = 492594331428720. Its totient is φ = 369445748571528.

The previous prime is 431020040000057. The next prime is 431020040000171. The reversal of 431020040000123 is 321000040020134.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431020040000123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 431020040000095 and 431020040000104.

It is not an unprimeable number, because it can be changed into a prime (431020040000923) 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, 30787145714288 + ... + 30787145714301.

It is an arithmetic number, because the mean of its divisors is an integer number (123148582857180).

Almost surely, 2^{431020040000123} is an apocalyptic number.

431020040000123 is a deficient number, since it is larger than the sum of its proper divisors (61574291428597).

431020040000123 is an equidigital number, since it uses as much as digits as its factorization.

431020040000123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61574291428596.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 431020040000123 its reverse (321000040020134), we get a palindrome (752020080020257).

The spelling of 431020040000123 in words is "four hundred thirty-one trillion, twenty billion, forty million, one hundred twenty-three", and thus it is an aban number.