31013222103221 has 4 divisors (see below), whose sum is σ = 31013233483200. Its totient is φ = 31013210723244.

The previous prime is 31013222103217. The next prime is 31013222103287. The reversal of 31013222103221 is 12230122231013.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 31013222103221 - 2² = 31013222103217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31013222100221) 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, 1093940 + ... + 7951298.

It is an arithmetic number, because the mean of its divisors is an integer number (7753308370800).

Almost surely, 2^{31013222103221} is an apocalyptic number.

It is an amenable number.

31013222103221 is a deficient number, since it is larger than the sum of its proper divisors (11379979).

31013222103221 is an equidigital number, since it uses as much as digits as its factorization.

31013222103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11379978.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31013222103221 its reverse (12230122231013), we get a palindrome (43243344334234).

The spelling of 31013222103221 in words is "thirty-one trillion, thirteen billion, two hundred twenty-two million, one hundred three thousand, two hundred twenty-one".