31023330121 has 4 divisors (see below), whose sum is σ = 35455234432. Its totient is φ = 26591425812.

The previous prime is 31023330119. The next prime is 31023330181. The reversal of 31023330121 is 12103332013.

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.

It is not a de Polignac number, because 31023330121 - 2¹ = 31023330119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31023330181) 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, 2215952145 + ... + 2215952158.

It is an arithmetic number, because the mean of its divisors is an integer number (8863808608).

Almost surely, 2^31023330121 is an apocalyptic number.

It is an amenable number.

31023330121 is a deficient number, since it is larger than the sum of its proper divisors (4431904311).

31023330121 is an equidigital number, since it uses as much as digits as its factorization.

31023330121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4431904310.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31023330121 its reverse (12103332013), we get a palindrome (43126662134).

The spelling of 31023330121 in words is "thirty-one billion, twenty-three million, three hundred thirty thousand, one hundred twenty-one".