230421529981 has 2 divisors, whose sum is σ = 230421529982. Its totient is φ = 230421529980.

The previous prime is 230421529969. The next prime is 230421530023. The reversal of 230421529981 is 189925124032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202440604356 + 27980925625 = 449934^2 + 167275^2 .

It is a cyclic number.

It is not a de Polignac number, because 230421529981 - 2⁹ = 230421529469 is a prime.

It is a super-2 number, since 2×230421529981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230421526981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115210764990 + 115210764991.

It is an arithmetic number, because the mean of its divisors is an integer number (115210764991).

Almost surely, 2^230421529981 is an apocalyptic number.

It is an amenable number.

230421529981 is a deficient number, since it is larger than the sum of its proper divisors (1).

230421529981 is an equidigital number, since it uses as much as digits as its factorization.

230421529981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 230421529981 in words is "two hundred thirty billion, four hundred twenty-one million, five hundred twenty-nine thousand, nine hundred eighty-one".