2031013121 has 2 divisors, whose sum is σ = 2031013122. Its totient is φ = 2031013120.

The previous prime is 2031013111. The next prime is 2031013123. The reversal of 2031013121 is 1213101302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1711890625 + 319122496 = 41375^2 + 17864^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031013121 - 2¹⁰ = 2031012097 is a prime.

Together with 2031013123, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2031013096 and 2031013105.

It is not a weakly prime, because it can be changed into another prime (2031013123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015506560 + 1015506561.

It is an arithmetic number, because the mean of its divisors is an integer number (1015506561).

Almost surely, 2^2031013121 is an apocalyptic number.

It is an amenable number.

2031013121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031013121 is an equidigital number, since it uses as much as digits as its factorization.

2031013121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 2031013121 is about 45066.7629301240. The cubic root of 2031013121 is about 1266.4000228744.

Adding to 2031013121 its reverse (1213101302), we get a palindrome (3244114423).

The spelling of 2031013121 in words is "two billion, thirty-one million, thirteen thousand, one hundred twenty-one".