31001013321 has 4 divisors (see below), whose sum is σ = 41334684432. Its totient is φ = 20667342212.

The previous prime is 31001013299. The next prime is 31001013341. The reversal of 31001013321 is 12331010013.

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 31001013321 - 2⁶ = 31001013257 is a prime.

It is a super-2 number, since 2×31001013321² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31001013321.

It is not an unprimeable number, because it can be changed into a prime (31001013341) 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, 5166835551 + ... + 5166835556.

It is an arithmetic number, because the mean of its divisors is an integer number (10333671108).

Almost surely, 2^31001013321 is an apocalyptic number.

It is an amenable number.

31001013321 is a deficient number, since it is larger than the sum of its proper divisors (10333671111).

31001013321 is a wasteful number, since it uses less digits than its factorization.

31001013321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10333671110.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31001013321 its reverse (12331010013), we get a palindrome (43332023334).

The spelling of 31001013321 in words is "thirty-one billion, one million, thirteen thousand, three hundred twenty-one".