31424130431123 has 4 divisors (see below), whose sum is σ = 31466424012528. Its totient is φ = 31381836849720.

The previous prime is 31424130431119. The next prime is 31424130431137. The reversal of 31424130431123 is 32113403142413.

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

It is a cyclic number.

It is not a de Polignac number, because 31424130431123 - 2² = 31424130431119 is a prime.

It is a super-2 number, since 2×31424130431123² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31424130431123.

It is not an unprimeable number, because it can be changed into a prime (31424130451123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21146789588 + ... + 21146791073.

It is an arithmetic number, because the mean of its divisors is an integer number (7866606003132).

Almost surely, 2^{31424130431123} is an apocalyptic number.

31424130431123 is a deficient number, since it is larger than the sum of its proper divisors (42293581405).

31424130431123 is an equidigital number, since it uses as much as digits as its factorization.

31424130431123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42293581404.

The product of its (nonzero) digits is 20736, while the sum is 32.

Adding to 31424130431123 its reverse (32113403142413), we get a palindrome (63537533573536).

The spelling of 31424130431123 in words is "thirty-one trillion, four hundred twenty-four billion, one hundred thirty million, four hundred thirty-one thousand, one hundred twenty-three".