2121122131 has 4 divisors (see below), whose sum is σ = 2135358000. Its totient is φ = 2106886264.

The previous prime is 2121122117. The next prime is 2121122141. The reversal of 2121122131 is 1312211212.

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 2121122131 - 2⁹ = 2121121619 is a prime.

It is a super-2 number, since 2×2121122131² = 8998318189235962322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121122111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7117711 + ... + 7118008.

It is an arithmetic number, because the mean of its divisors is an integer number (533839500).

Almost surely, 2^2121122131 is an apocalyptic number.

2121122131 is a deficient number, since it is larger than the sum of its proper divisors (14235869).

2121122131 is a wasteful number, since it uses less digits than its factorization.

2121122131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14235868.

The product of its digits is 48, while the sum is 16.

The square root of 2121122131 is about 46055.6416848143. The cubic root of 2121122131 is about 1284.8582726095.

Adding to 2121122131 its reverse (1312211212), we get a palindrome (3433333343).

The spelling of 2121122131 in words is "two billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred thirty-one".