2821997008997 has 2 divisors, whose sum is σ = 2821997008998. Its totient is φ = 2821997008996.

The previous prime is 2821997008993. The next prime is 2821997009047. The reversal of 2821997008997 is 7998007991282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1663362201796 + 1158634807201 = 1289714^2 + 1076399^2 .

It is a cyclic number.

It is not a de Polignac number, because 2821997008997 - 2² = 2821997008993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2821997008997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2821997008993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410998504498 + 1410998504499.

It is an arithmetic number, because the mean of its divisors is an integer number (1410998504499).

Almost surely, 2^{2821997008997} is an apocalyptic number.

It is an amenable number.

2821997008997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2821997008997 is an equidigital number, since it uses as much as digits as its factorization.

2821997008997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82301184, while the sum is 71.

The spelling of 2821997008997 in words is "two trillion, eight hundred twenty-one billion, nine hundred ninety-seven million, eight thousand, nine hundred ninety-seven".