2120121131 has 4 divisors (see below), whose sum is σ = 2149982064. Its totient is φ = 2090260200.

The previous prime is 2120121097. The next prime is 2120121139. The reversal of 2120121131 is 1311210212.

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 2120121131 - 2¹⁴ = 2120104747 is a prime.

It is a super-2 number, since 2×2120121131² = 8989827220225438322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120121139) 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, 14930360 + ... + 14930501.

It is an arithmetic number, because the mean of its divisors is an integer number (537495516).

Almost surely, 2^2120121131 is an apocalyptic number.

2120121131 is a deficient number, since it is larger than the sum of its proper divisors (29860933).

2120121131 is an equidigital number, since it uses as much as digits as its factorization.

2120121131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29860932.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 2120121131 is about 46044.7731126998. The cubic root of 2120121131 is about 1284.6561240260.

Adding to 2120121131 its reverse (1311210212), we get a palindrome (3431331343).

The spelling of 2120121131 in words is "two billion, one hundred twenty million, one hundred twenty-one thousand, one hundred thirty-one".