202101111099917 has 2 divisors, whose sum is σ = 202101111099918. Its totient is φ = 202101111099916.

The previous prime is 202101111099887. The next prime is 202101111100079. The reversal of 202101111099917 is 719990111101202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172118105345641 + 29983005754276 = 13119379^2 + 5475674^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202101111099917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202101111099617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101050555549958 + 101050555549959.

It is an arithmetic number, because the mean of its divisors is an integer number (101050555549959).

Almost surely, 2^{202101111099917} is an apocalyptic number.

It is an amenable number.

202101111099917 is a deficient number, since it is larger than the sum of its proper divisors (1).

202101111099917 is an equidigital number, since it uses as much as digits as its factorization.

202101111099917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 44.

The spelling of 202101111099917 in words is "two hundred two trillion, one hundred one billion, one hundred eleven million, ninety-nine thousand, nine hundred seventeen".