12021120997 has 2 divisors, whose sum is σ = 12021120998. Its totient is φ = 12021120996.

The previous prime is 12021120983. The next prime is 12021121019. The reversal of 12021120997 is 79902112021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9635189281 + 2385931716 = 98159^2 + 48846^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021120997 - 2²⁷ = 11886903269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12021120497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010560498 + 6010560499.

It is an arithmetic number, because the mean of its divisors is an integer number (6010560499).

Almost surely, 2^12021120997 is an apocalyptic number.

It is an amenable number.

12021120997 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021120997 is an equidigital number, since it uses as much as digits as its factorization.

12021120997 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 34.

The spelling of 12021120997 in words is "twelve billion, twenty-one million, one hundred twenty thousand, nine hundred ninety-seven".