21020300010097 has 2 divisors, whose sum is σ = 21020300010098. Its totient is φ = 21020300010096.

The previous prime is 21020300010091. The next prime is 21020300010211. The reversal of 21020300010097 is 79001000302012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20860083136656 + 160216873441 = 4567284^2 + 400271^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21020300010097 is a prime.

It is not a weakly prime, because it can be changed into another prime (21020300010091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510150005048 + 10510150005049.

It is an arithmetic number, because the mean of its divisors is an integer number (10510150005049).

Almost surely, 2^{21020300010097} is an apocalyptic number.

It is an amenable number.

21020300010097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020300010097 is an equidigital number, since it uses as much as digits as its factorization.

21020300010097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The spelling of 21020300010097 in words is "twenty-one trillion, twenty billion, three hundred million, ten thousand, ninety-seven".