230421451021 has 2 divisors, whose sum is σ = 230421451022. Its totient is φ = 230421451020.

The previous prime is 230421451019. The next prime is 230421451027. The reversal of 230421451021 is 120154124032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166406884900 + 64014566121 = 407930^2 + 253011^2 .

It is a cyclic number.

It is not a de Polignac number, because 230421451021 - 2¹ = 230421451019 is a prime.

Together with 230421451019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230421451027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115210725510 + 115210725511.

It is an arithmetic number, because the mean of its divisors is an integer number (115210725511).

Almost surely, 2^230421451021 is an apocalyptic number.

It is an amenable number.

230421451021 is a deficient number, since it is larger than the sum of its proper divisors (1).

230421451021 is an equidigital number, since it uses as much as digits as its factorization.

230421451021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 230421451021 its reverse (120154124032), we get a palindrome (350575575053).

The spelling of 230421451021 in words is "two hundred thirty billion, four hundred twenty-one million, four hundred fifty-one thousand, twenty-one".