2131211131 has 32 divisors (see below), whose sum is σ = 2555642880. Its totient is φ = 1738800000.

The previous prime is 2131211113. The next prime is 2131211161. The reversal of 2131211131 is 1311121312.

It is a happy number.

It is not a de Polignac number, because 2131211131 - 2¹⁵ = 2131178363 is a prime.

It is a super-2 number, since 2×2131211131² = 9084121769796598322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2131211111) 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, 7693765 + ... + 7694041.

It is an arithmetic number, because the mean of its divisors is an integer number (79863840).

Almost surely, 2^2131211131 is an apocalyptic number.

2131211131 is a deficient number, since it is larger than the sum of its proper divisors (424431749).

2131211131 is a wasteful number, since it uses less digits than its factorization.

2131211131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715.

The product of its digits is 36, while the sum is 16.

The square root of 2131211131 is about 46165.0423047570. The cubic root of 2131211131 is about 1286.8921703857.

Adding to 2131211131 its reverse (1311121312), we get a palindrome (3442332443).

The spelling of 2131211131 in words is "two billion, one hundred thirty-one million, two hundred eleven thousand, one hundred thirty-one".