21312201030097 has 2 divisors, whose sum is σ = 21312201030098. Its totient is φ = 21312201030096.

The previous prime is 21312201030019. The next prime is 21312201030151. The reversal of 21312201030097 is 79003010221312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21083488488976 + 228712541121 = 4591676^2 + 478239^2 .

It is a cyclic number.

It is not a de Polignac number, because 21312201030097 - 2³⁹ = 20762445216209 is a prime.

It is not a weakly prime, because it can be changed into another prime (21312201430097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656100515048 + 10656100515049.

It is an arithmetic number, because the mean of its divisors is an integer number (10656100515049).

Almost surely, 2^{21312201030097} is an apocalyptic number.

It is an amenable number.

21312201030097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21312201030097 is an equidigital number, since it uses as much as digits as its factorization.

21312201030097 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 31.

The spelling of 21312201030097 in words is "twenty-one trillion, three hundred twelve billion, two hundred one million, thirty thousand, ninety-seven".