2131222013 has 4 divisors (see below), whose sum is σ = 2167344480. Its totient is φ = 2095099548.

The previous prime is 2131221997. The next prime is 2131222019. The reversal of 2131222013 is 3102221312.

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.

It is a cyclic number.

It is not a de Polignac number, because 2131222013 - 2⁴ = 2131221997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2131221982 and 2131222000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131222019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18061145 + ... + 18061262.

It is an arithmetic number, because the mean of its divisors is an integer number (541836120).

Almost surely, 2^2131222013 is an apocalyptic number.

It is an amenable number.

2131222013 is a deficient number, since it is larger than the sum of its proper divisors (36122467).

2131222013 is an equidigital number, since it uses as much as digits as its factorization.

2131222013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36122466.

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

The square root of 2131222013 is about 46165.1601643490. The cubic root of 2131222013 is about 1286.8943606796.

Adding to 2131222013 its reverse (3102221312), we get a palindrome (5233443325).

The spelling of 2131222013 in words is "two billion, one hundred thirty-one million, two hundred twenty-two thousand, thirteen".