2123311031 has 2 divisors, whose sum is σ = 2123311032. Its totient is φ = 2123311030.

The previous prime is 2123310991. The next prime is 2123311049. The reversal of 2123311031 is 1301133212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2123311031 - 2⁶ = 2123310967 is a prime.

It is a super-2 number, since 2×2123311031² = 9016899468732565922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123311051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061655515 + 1061655516.

It is an arithmetic number, because the mean of its divisors is an integer number (1061655516).

Almost surely, 2^2123311031 is an apocalyptic number.

2123311031 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123311031 is an equidigital number, since it uses as much as digits as its factorization.

2123311031 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2123311031 is about 46079.3992039827. The cubic root of 2123311031 is about 1285.3000921154.

Adding to 2123311031 its reverse (1301133212), we get a palindrome (3424444243).

The spelling of 2123311031 in words is "two billion, one hundred twenty-three million, three hundred eleven thousand, thirty-one".