2121322031 has 8 divisors (see below), whose sum is σ = 2180329200. Its totient is φ = 2063096640.

The previous prime is 2121321989. The next prime is 2121322043. The reversal of 2121322031 is 1302231212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2121322031 - 2³⁰ = 1047580207 is a prime.

It is a super-2 number, since 2×2121322031² = 9000014318411929922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121322061) 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 7 ways as a sum of consecutive naturals, for example, 189941 + ... + 200798.

It is an arithmetic number, because the mean of its divisors is an integer number (272541150).

Almost surely, 2^2121322031 is an apocalyptic number.

2121322031 is a deficient number, since it is larger than the sum of its proper divisors (59007169).

2121322031 is an equidigital number, since it uses as much as digits as its factorization.

2121322031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390889.

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

The square root of 2121322031 is about 46057.8118346931. The cubic root of 2121322031 is about 1284.8986341233.

Adding to 2121322031 its reverse (1302231212), we get a palindrome (3423553243).

The spelling of 2121322031 in words is "two billion, one hundred twenty-one million, three hundred twenty-two thousand, thirty-one".