220001100997 has 2 divisors, whose sum is σ = 220001100998. Its totient is φ = 220001100996.

The previous prime is 220001100989. The next prime is 220001101037. The reversal of 220001100997 is 799001100022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219202812481 + 798288516 = 468191^2 + 28254^2 .

It is a cyclic number.

It is not a de Polignac number, because 220001100997 - 2³ = 220001100989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220001100967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110000550498 + 110000550499.

It is an arithmetic number, because the mean of its divisors is an integer number (110000550499).

Almost surely, 2^220001100997 is an apocalyptic number.

It is an amenable number.

220001100997 is a deficient number, since it is larger than the sum of its proper divisors (1).

220001100997 is an equidigital number, since it uses as much as digits as its factorization.

220001100997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 31.

The spelling of 220001100997 in words is "two hundred twenty billion, one million, one hundred thousand, nine hundred ninety-seven".