31950121 has 4 divisors (see below), whose sum is σ = 36514432. Its totient is φ = 27385812.

The previous prime is 31950097. The next prime is 31950133. The reversal of 31950121 is 12105913.

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: 12105913 = 317 ⋅38189.

It is a cyclic number.

It is not a de Polignac number, because 31950121 - 2⁷ = 31949993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31950092 and 31950101.

It is not an unprimeable number, because it can be changed into a prime (31930121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2282145 + ... + 2282158.

It is an arithmetic number, because the mean of its divisors is an integer number (9128608).

Almost surely, 2^31950121 is an apocalyptic number.

It is an amenable number.

31950121 is a deficient number, since it is larger than the sum of its proper divisors (4564311).

31950121 is an equidigital number, since it uses as much as digits as its factorization.

31950121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4564310.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 31950121 is about 5652.4438077702. The cubic root of 31950121 is about 317.3151704948.

The spelling of 31950121 in words is "thirty-one million, nine hundred fifty thousand, one hundred twenty-one".