31240103321 has 12 divisors (see below), whose sum is σ = 36778370832. Its totient is φ = 26454610728.

The previous prime is 31240103311. The next prime is 31240103351. The reversal of 31240103321 is 12330104213.

It is not a de Polignac number, because 31240103321 - 2²² = 31235909017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31240103293 and 31240103302.

It is not an unprimeable number, because it can be changed into a prime (31240103311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3836615 + ... + 3844748.

It is an arithmetic number, because the mean of its divisors is an integer number (3064864236).

Almost surely, 2^31240103321 is an apocalyptic number.

It is an amenable number.

31240103321 is a deficient number, since it is larger than the sum of its proper divisors (5538267511).

31240103321 is an equidigital number, since it uses as much as digits as its factorization.

31240103321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7681460 (or 7681453 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31240103321 its reverse (12330104213), we get a palindrome (43570207534).

The spelling of 31240103321 in words is "thirty-one billion, two hundred forty million, one hundred three thousand, three hundred twenty-one".