2310131221 has 2 divisors, whose sum is σ = 2310131222. Its totient is φ = 2310131220.

The previous prime is 2310131147. The next prime is 2310131227. The reversal of 2310131221 is 1221310132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1178548900 + 1131582321 = 34330^2 + 33639^2 .

It is a cyclic number.

It is not a de Polignac number, because 2310131221 - 2¹³ = 2310123029 is a prime.

It is a super-3 number, since 3×2310131221³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2310131195 and 2310131204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2310131227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155065610 + 1155065611.

It is an arithmetic number, because the mean of its divisors is an integer number (1155065611).

Almost surely, 2^2310131221 is an apocalyptic number.

It is an amenable number.

2310131221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2310131221 is an equidigital number, since it uses as much as digits as its factorization.

2310131221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2310131221 is about 48063.8244524923. The cubic root of 2310131221 is about 1321.9414385741.

Adding to 2310131221 its reverse (1221310132), we get a palindrome (3531441353).

The spelling of 2310131221 in words is "two billion, three hundred ten million, one hundred thirty-one thousand, two hundred twenty-one".