2131422121 has 4 divisors (see below), whose sum is σ = 2224092672. Its totient is φ = 2038751572.

The previous prime is 2131422103. The next prime is 2131422127. The reversal of 2131422121 is 1212241312.

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 2131422121 - 2⁷ = 2131421993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131422127) 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, 46335241 + ... + 46335286.

It is an arithmetic number, because the mean of its divisors is an integer number (556023168).

Almost surely, 2^2131422121 is an apocalyptic number.

It is an amenable number.

2131422121 is a deficient number, since it is larger than the sum of its proper divisors (92670551).

2131422121 is an equidigital number, since it uses as much as digits as its factorization.

2131422121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92670550.

The product of its digits is 192, while the sum is 19.

The square root of 2131422121 is about 46167.3274188576. The cubic root of 2131422121 is about 1286.9346364457.

Adding to 2131422121 its reverse (1212241312), we get a palindrome (3343663433).

The spelling of 2131422121 in words is "two billion, one hundred thirty-one million, four hundred twenty-two thousand, one hundred twenty-one".