31201020323 has 16 divisors (see below), whose sum is σ = 35630931456. Its totient is φ = 27044571840.

The previous prime is 31201020317. The next prime is 31201020349. The reversal of 31201020323 is 32302010213.

It is not a de Polignac number, because 31201020323 - 2¹² = 31201016227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31201028323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117815 + ... + 276192.

It is an arithmetic number, because the mean of its divisors is an integer number (2226933216).

Almost surely, 2^31201020323 is an apocalyptic number.

31201020323 is a deficient number, since it is larger than the sum of its proper divisors (4429911133).

31201020323 is a wasteful number, since it uses less digits than its factorization.

31201020323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394354.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31201020323 its reverse (32302010213), we get a palindrome (63503030536).

The spelling of 31201020323 in words is "thirty-one billion, two hundred one million, twenty thousand, three hundred twenty-three".