1021221112997 has 2 divisors, whose sum is σ = 1021221112998. Its totient is φ = 1021221112996.

The previous prime is 1021221112979. The next prime is 1021221113039. The reversal of 1021221112997 is 7992111221201.

1021221112997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (1021221112979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 960303962401 + 60917150596 = 979951^2 + 246814^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021221112997 - 2¹⁴ = 1021221096613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021221112997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021221112297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510610556498 + 510610556499.

It is an arithmetic number, because the mean of its divisors is an integer number (510610556499).

Almost surely, 2^{1021221112997} is an apocalyptic number.

It is an amenable number.

1021221112997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021221112997 is an equidigital number, since it uses as much as digits as its factorization.

1021221112997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 38.

The spelling of 1021221112997 in words is "one trillion, twenty-one billion, two hundred twenty-one million, one hundred twelve thousand, nine hundred ninety-seven".