31321313201 has 4 divisors (see below), whose sum is σ = 31717785600. Its totient is φ = 30924840804.

The previous prime is 31321313183. The next prime is 31321313209. The reversal of 31321313201 is 10231312313.

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 an emirpimes, since its reverse is a distinct semiprime: 10231312313 = 379 ⋅26995547.

It is a cyclic number.

It is not a de Polignac number, because 31321313201 - 2¹⁰ = 31321312177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31321313209) 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, 198236081 + ... + 198236238.

It is an arithmetic number, because the mean of its divisors is an integer number (7929446400).

Almost surely, 2^31321313201 is an apocalyptic number.

It is an amenable number.

31321313201 is a deficient number, since it is larger than the sum of its proper divisors (396472399).

31321313201 is an equidigital number, since it uses as much as digits as its factorization.

31321313201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396472398.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31321313201 its reverse (10231312313), we get a palindrome (41552625514).

The spelling of 31321313201 in words is "thirty-one billion, three hundred twenty-one million, three hundred thirteen thousand, two hundred one".