231010012021 has 2 divisors, whose sum is σ = 231010012022. Its totient is φ = 231010012020.

The previous prime is 231010011989. The next prime is 231010012039. The reversal of 231010012021 is 120210010132.

231010012021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213397802500 + 17612209521 = 461950^2 + 132711^2 .

It is a cyclic number.

It is not a de Polignac number, because 231010012021 - 2⁵ = 231010011989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231010011992 and 231010012010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231010019021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115505006010 + 115505006011.

It is an arithmetic number, because the mean of its divisors is an integer number (115505006011).

Almost surely, 2^231010012021 is an apocalyptic number.

It is an amenable number.

231010012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

231010012021 is an equidigital number, since it uses as much as digits as its factorization.

231010012021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 231010012021 its reverse (120210010132), we get a palindrome (351220022153).

The spelling of 231010012021 in words is "two hundred thirty-one billion, ten million, twelve thousand, twenty-one".