231043221029 has 2 divisors, whose sum is σ = 231043221030. Its totient is φ = 231043221028.

The previous prime is 231043220987. The next prime is 231043221077. The reversal of 231043221029 is 920122340132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211506170404 + 19537050625 = 459898^2 + 139775^2 .

It is a cyclic number.

It is not a de Polignac number, because 231043221029 - 2⁸ = 231043220773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231043220992 and 231043221010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231043224029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115521610514 + 115521610515.

It is an arithmetic number, because the mean of its divisors is an integer number (115521610515).

Almost surely, 2^231043221029 is an apocalyptic number.

It is an amenable number.

231043221029 is a deficient number, since it is larger than the sum of its proper divisors (1).

231043221029 is an equidigital number, since it uses as much as digits as its factorization.

231043221029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 231043221029 in words is "two hundred thirty-one billion, forty-three million, two hundred twenty-one thousand, twenty-nine".