220020102021997 has 2 divisors, whose sum is σ = 220020102021998. Its totient is φ = 220020102021996.

The previous prime is 220020102021989. The next prime is 220020102022027. The reversal of 220020102021997 is 799120201020022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220020084289476 + 17732521 = 14833074^2 + 4211^2 .

It is a cyclic number.

It is not a de Polignac number, because 220020102021997 - 2³ = 220020102021989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220020102021917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110010051010998 + 110010051010999.

It is an arithmetic number, because the mean of its divisors is an integer number (110010051010999).

Almost surely, 2^{220020102021997} is an apocalyptic number.

It is an amenable number.

220020102021997 is a deficient number, since it is larger than the sum of its proper divisors (1).

220020102021997 is an equidigital number, since it uses as much as digits as its factorization.

220020102021997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 220020102021997 in words is "two hundred twenty trillion, twenty billion, one hundred two million, twenty-one thousand, nine hundred ninety-seven".