2120343131 has 2 divisors, whose sum is σ = 2120343132. Its totient is φ = 2120343130.

The previous prime is 2120343119. The next prime is 2120343151. The reversal of 2120343131 is 1313430212.

It is an a-pointer prime, because the next prime (2120343151) can be obtained adding 2120343131 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2120343131 - 2³⁰ = 1046601307 is a prime.

It is a super-2 number, since 2×2120343131² = 8991709986357766322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2120343151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060171565 + 1060171566.

It is an arithmetic number, because the mean of its divisors is an integer number (1060171566).

Almost surely, 2^2120343131 is an apocalyptic number.

2120343131 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120343131 is an equidigital number, since it uses as much as digits as its factorization.

2120343131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 2120343131 is about 46047.1837466745. The cubic root of 2120343131 is about 1284.7009616694.

Adding to 2120343131 its reverse (1313430212), we get a palindrome (3433773343).

The spelling of 2120343131 in words is "two billion, one hundred twenty million, three hundred forty-three thousand, one hundred thirty-one".