2131201323 has 24 divisors (see below), whose sum is σ = 3147213888. Its totient is φ = 1389105792.

The previous prime is 2131201309. The next prime is 2131201337. The reversal of 2131201323 is 3231021312.

It is an interprime number because it is at equal distance from previous prime (2131201309) and next prime (2131201337).

It is not a de Polignac number, because 2131201323 - 2⁴ = 2131201307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2131201296 and 2131201305.

It is not an unprimeable number, because it can be changed into a prime (2131201343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 521215 + ... + 525287.

It is an arithmetic number, because the mean of its divisors is an integer number (131133912).

Almost surely, 2^2131201323 is an apocalyptic number.

2131201323 is a deficient number, since it is larger than the sum of its proper divisors (1016012565).

2131201323 is a wasteful number, since it uses less digits than its factorization.

2131201323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5363 (or 5360 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2131201323 is about 46164.9360770704. The cubic root of 2131201323 is about 1286.8901962565.

Adding to 2131201323 its reverse (3231021312), we get a palindrome (5362222635).

The spelling of 2131201323 in words is "two billion, one hundred thirty-one million, two hundred one thousand, three hundred twenty-three".