20212012120997 has 2 divisors, whose sum is σ = 20212012120998. Its totient is φ = 20212012120996.

The previous prime is 20212012120981. The next prime is 20212012121017. The reversal of 20212012120997 is 79902121021202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13869114463876 + 6342897657121 = 3724126^2 + 2518511^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212012120997 - 2⁴ = 20212012120981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20212012120997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212012120397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106006060498 + 10106006060499.

It is an arithmetic number, because the mean of its divisors is an integer number (10106006060499).

Almost surely, 2^{20212012120997} is an apocalyptic number.

It is an amenable number.

20212012120997 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212012120997 is an equidigital number, since it uses as much as digits as its factorization.

20212012120997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The spelling of 20212012120997 in words is "twenty trillion, two hundred twelve billion, twelve million, one hundred twenty thousand, nine hundred ninety-seven".