2123011131 has 4 divisors (see below), whose sum is σ = 2830681512. Its totient is φ = 1415340752.

The previous prime is 2123011127. The next prime is 2123011157. The reversal of 2123011131 is 1311103212.

It is a happy number.

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 2123011131 - 2² = 2123011127 is a prime.

It is a super-2 number, since 2×2123011131² = 9014352524699798322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2123011131.

It is not an unprimeable number, because it can be changed into a prime (2123011181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353835186 + ... + 353835191.

It is an arithmetic number, because the mean of its divisors is an integer number (707670378).

Almost surely, 2^2123011131 is an apocalyptic number.

2123011131 is a deficient number, since it is larger than the sum of its proper divisors (707670381).

2123011131 is an equidigital number, since it uses as much as digits as its factorization.

2123011131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707670380.

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

The square root of 2123011131 is about 46076.1449233766. The cubic root of 2123011131 is about 1285.2395766216.

Adding to 2123011131 its reverse (1311103212), we get a palindrome (3434114343).

The spelling of 2123011131 in words is "two billion, one hundred twenty-three million, eleven thousand, one hundred thirty-one".