31232021201 has 4 divisors (see below), whose sum is σ = 31233478452. Its totient is φ = 31230563952.

The previous prime is 31232021179. The next prime is 31232021213. The reversal of 31232021201 is 10212023213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30468051601 + 763969600 = 174551^2 + 27640^2 .

It is a cyclic number.

It is not a de Polignac number, because 31232021201 - 2⁶ = 31232021137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31232021201.

It is not an unprimeable number, because it can be changed into a prime (31232021251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695990 + ... + 739503.

It is an arithmetic number, because the mean of its divisors is an integer number (7808369613).

Almost surely, 2^31232021201 is an apocalyptic number.

It is an amenable number.

31232021201 is a deficient number, since it is larger than the sum of its proper divisors (1457251).

31232021201 is a wasteful number, since it uses less digits than its factorization.

31232021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457250.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31232021201 its reverse (10212023213), we get a palindrome (41444044414).

The spelling of 31232021201 in words is "thirty-one billion, two hundred thirty-two million, twenty-one thousand, two hundred one".