31213221021201 has 16 divisors (see below), whose sum is σ = 43819488880640. Its totient is φ = 19708456556880.

The previous prime is 31213221021173. The next prime is 31213221021233. The reversal of 31213221021201 is 10212012231213.

It is not a de Polignac number, because 31213221021201 - 2⁶ = 31213221021137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31213221021001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71401285 + ... + 71837106.

It is an arithmetic number, because the mean of its divisors is an integer number (2738718055040).

Almost surely, 2^{31213221021201} is an apocalyptic number.

It is an amenable number.

31213221021201 is a deficient number, since it is larger than the sum of its proper divisors (12606267859439).

31213221021201 is a wasteful number, since it uses less digits than its factorization.

31213221021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143242236.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 31213221021201 its reverse (10212012231213), we get a palindrome (41425233252414).

The spelling of 31213221021201 in words is "thirty-one trillion, two hundred thirteen billion, two hundred twenty-one million, twenty-one thousand, two hundred one".