2123420331 has 4 divisors (see below), whose sum is σ = 2831227112. Its totient is φ = 1415613552.

The previous prime is 2123420311. The next prime is 2123420333. The reversal of 2123420331 is 1330243212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2123420331 - 2⁶ = 2123420267 is a prime.

It is a super-2 number, since 2×2123420331² = 9017827804208299122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123420298 and 2123420307.

It is not an unprimeable number, because it can be changed into a prime (2123420333) 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, 353903386 + ... + 353903391.

It is an arithmetic number, because the mean of its divisors is an integer number (707806778).

Almost surely, 2^2123420331 is an apocalyptic number.

2123420331 is a deficient number, since it is larger than the sum of its proper divisors (707806781).

2123420331 is an equidigital number, since it uses as much as digits as its factorization.

2123420331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707806780.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 2123420331 is about 46080.5851850864. The cubic root of 2123420331 is about 1285.3221458619.

Adding to 2123420331 its reverse (1330243212), we get a palindrome (3453663543).

The spelling of 2123420331 in words is "two billion, one hundred twenty-three million, four hundred twenty thousand, three hundred thirty-one".