31321220212199 has 4 divisors (see below), whose sum is σ = 32331582154560. Its totient is φ = 30310858269840.

The previous prime is 31321220212187. The next prime is 31321220212229. The reversal of 31321220212199 is 99121202212313.

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 31321220212199 - 2²⁸ = 31320951776743 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 (31321220202199) 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, 505180971134 + ... + 505180971195.

It is an arithmetic number, because the mean of its divisors is an integer number (8082895538640).

Almost surely, 2^{31321220212199} is an apocalyptic number.

31321220212199 is a deficient number, since it is larger than the sum of its proper divisors (1010361942361).

31321220212199 is a wasteful number, since it uses less digits than its factorization.

31321220212199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010361942360.

The product of its (nonzero) digits is 23328, while the sum is 38.

The spelling of 31321220212199 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred twenty million, two hundred twelve thousand, one hundred ninety-nine".