2121320031 has 8 divisors (see below), whose sum is σ = 2870642304. Its totient is φ = 1393105560.

The previous prime is 2121320017. The next prime is 2121320039. The reversal of 2121320031 is 1300231212.

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

It is not a de Polignac number, because 2121320031 - 2¹³ = 2121311839 is a prime.

It is a super-2 number, since 2×2121320031² = 8999997347843681922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121320039) 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, 5276715 + ... + 5277116.

It is an arithmetic number, because the mean of its divisors is an integer number (358830288).

Almost surely, 2^2121320031 is an apocalyptic number.

2121320031 is a deficient number, since it is larger than the sum of its proper divisors (749322273).

2121320031 is a wasteful number, since it uses less digits than its factorization.

2121320031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10553901.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2121320031 is about 46057.7901228446. The cubic root of 2121320031 is about 1284.8982303188.

Adding to 2121320031 its reverse (1300231212), we get a palindrome (3421551243).

The spelling of 2121320031 in words is "two billion, one hundred twenty-one million, three hundred twenty thousand, thirty-one".