31340124142021 has 4 divisors (see below), whose sum is σ = 31340520374944. Its totient is φ = 31339727909100.

The previous prime is 31340124142003. The next prime is 31340124142031. The reversal of 31340124142021 is 12024142104313.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 31340124142021 - 2²⁷ = 31339989924293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31340124142031) 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, 197997795 + ... + 198156016.

It is an arithmetic number, because the mean of its divisors is an integer number (7835130093736).

Almost surely, 2^{31340124142021} is an apocalyptic number.

It is an amenable number.

31340124142021 is a deficient number, since it is larger than the sum of its proper divisors (396232923).

31340124142021 is an equidigital number, since it uses as much as digits as its factorization.

31340124142021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396232922.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 31340124142021 its reverse (12024142104313), we get a palindrome (43364266246334).

The spelling of 31340124142021 in words is "thirty-one trillion, three hundred forty billion, one hundred twenty-four million, one hundred forty-two thousand, twenty-one".