231020122010009 has 2 divisors, whose sum is σ = 231020122010010. Its totient is φ = 231020122010008.

The previous prime is 231020122009991. The next prime is 231020122010023. The reversal of 231020122010009 is 900010221020132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200975987560000 + 30044134450009 = 14176600^2 + 5481253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231020122010009 is a prime.

It is not a weakly prime, because it can be changed into another prime (231020122015009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115510061005004 + 115510061005005.

It is an arithmetic number, because the mean of its divisors is an integer number (115510061005005).

Almost surely, 2^{231020122010009} is an apocalyptic number.

It is an amenable number.

231020122010009 is a deficient number, since it is larger than the sum of its proper divisors (1).

231020122010009 is an equidigital number, since it uses as much as digits as its factorization.

231020122010009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 231020122010009 in words is "two hundred thirty-one trillion, twenty billion, one hundred twenty-two million, ten thousand, nine".