97021012021 has 2 divisors, whose sum is σ = 97021012022. Its totient is φ = 97021012020.

The previous prime is 97021012013. The next prime is 97021012037. The reversal of 97021012021 is 12021012079.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92091006225 + 4930005796 = 303465^2 + 70214^2 .

It is an emirp because it is prime and its reverse (12021012079) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97021012021 - 2³ = 97021012013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97021012421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48510506010 + 48510506011.

It is an arithmetic number, because the mean of its divisors is an integer number (48510506011).

Almost surely, 2^97021012021 is an apocalyptic number.

It is an amenable number.

97021012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

97021012021 is an equidigital number, since it uses as much as digits as its factorization.

97021012021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The spelling of 97021012021 in words is "ninety-seven billion, twenty-one million, twelve thousand, twenty-one".