211220102220997 has 2 divisors, whose sum is σ = 211220102220998. Its totient is φ = 211220102220996.

The previous prime is 211220102220989. The next prime is 211220102221043. The reversal of 211220102220997 is 799022201022112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133777884605121 + 77442217615876 = 11566239^2 + 8800126^2 .

It is a cyclic number.

It is not a de Polignac number, because 211220102220997 - 2³ = 211220102220989 is a prime.

It is a super-2 number, since 2×211220102220997² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211220102220397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610051110498 + 105610051110499.

It is an arithmetic number, because the mean of its divisors is an integer number (105610051110499).

Almost surely, 2^{211220102220997} is an apocalyptic number.

It is an amenable number.

211220102220997 is a deficient number, since it is larger than the sum of its proper divisors (1).

211220102220997 is an equidigital number, since it uses as much as digits as its factorization.

211220102220997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 211220102220997 in words is "two hundred eleven trillion, two hundred twenty billion, one hundred two million, two hundred twenty thousand, nine hundred ninety-seven".