2123222131 has 4 divisors (see below), whose sum is σ = 2130138472. Its totient is φ = 2116305792.

The previous prime is 2123222093. The next prime is 2123222141. The reversal of 2123222131 is 1312223212.

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

It is a cyclic number.

It is not a de Polignac number, because 2123222131 - 2⁹ = 2123221619 is a prime.

It is a super-2 number, since 2×2123222131² = 9016144435136362322, 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 = 2123222099 and 2123222108.

It is not an unprimeable number, because it can be changed into a prime (2123222141) 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 3 ways as a sum of consecutive naturals, for example, 3457710 + ... + 3458323.

It is an arithmetic number, because the mean of its divisors is an integer number (532534618).

Almost surely, 2^2123222131 is an apocalyptic number.

2123222131 is a deficient number, since it is larger than the sum of its proper divisors (6916341).

2123222131 is an equidigital number, since it uses as much as digits as its factorization.

2123222131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6916340.

The product of its digits is 288, while the sum is 19.

The square root of 2123222131 is about 46078.4345545723. The cubic root of 2123222131 is about 1285.2821539721.

Adding to 2123222131 its reverse (1312223212), we get a palindrome (3435445343).

The spelling of 2123222131 in words is "two billion, one hundred twenty-three million, two hundred twenty-two thousand, one hundred thirty-one".