2120131311 has 32 divisors (see below), whose sum is σ = 2940883200. Its totient is φ = 1357812480.

The previous prime is 2120131271. The next prime is 2120131331. The reversal of 2120131311 is 1131310212.

It is a happy number.

It is not a de Polignac number, because 2120131311 - 2¹⁹ = 2119607023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120131331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1932115 + ... + 1933211.

It is an arithmetic number, because the mean of its divisors is an integer number (91902600).

Almost surely, 2^2120131311 is an apocalyptic number.

2120131311 is a deficient number, since it is larger than the sum of its proper divisors (820751889).

2120131311 is a wasteful number, since it uses less digits than its factorization.

2120131311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 2120131311 is about 46044.8836571448. The cubic root of 2120131311 is about 1284.6581801629.

Adding to 2120131311 its reverse (1131310212), we get a palindrome (3251441523).

The spelling of 2120131311 in words is "two billion, one hundred twenty million, one hundred thirty-one thousand, three hundred eleven".