21230230097 has 2 divisors, whose sum is σ = 21230230098. Its totient is φ = 21230230096.

The previous prime is 21230230069. The next prime is 21230230121. The reversal of 21230230097 is 79003203212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12766966081 + 8463264016 = 112991^2 + 91996^2 .

It is a cyclic number.

It is not a de Polignac number, because 21230230097 - 2⁶ = 21230230033 is a prime.

It is not a weakly prime, because it can be changed into another prime (21230230057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615115048 + 10615115049.

It is an arithmetic number, because the mean of its divisors is an integer number (10615115049).

Almost surely, 2^21230230097 is an apocalyptic number.

It is an amenable number.

21230230097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230230097 is an equidigital number, since it uses as much as digits as its factorization.

21230230097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The spelling of 21230230097 in words is "twenty-one billion, two hundred thirty million, two hundred thirty thousand, ninety-seven".