2031313121 has 2 divisors, whose sum is σ = 2031313122. Its totient is φ = 2031313120.

The previous prime is 2031313073. The next prime is 2031313133. The reversal of 2031313121 is 1213131302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1411054096 + 620259025 = 37564^2 + 24905^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031313121 - 2²² = 2027118817 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2031313121.

It is not a weakly prime, because it can be changed into another prime (2031313171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015656560 + 1015656561.

It is an arithmetic number, because the mean of its divisors is an integer number (1015656561).

Almost surely, 2^2031313121 is an apocalyptic number.

It is an amenable number.

2031313121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031313121 is an equidigital number, since it uses as much as digits as its factorization.

2031313121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 2031313121 is about 45070.0912024815. The cubic root of 2031313121 is about 1266.4623729234.

Adding to 2031313121 its reverse (1213131302), we get a palindrome (3244444423).

The spelling of 2031313121 in words is "two billion, thirty-one million, three hundred thirteen thousand, one hundred twenty-one".