201122100997 has 2 divisors, whose sum is σ = 201122100998. Its totient is φ = 201122100996.

The previous prime is 201122100989. The next prime is 201122101073. The reversal of 201122100997 is 799001221102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102826683556 + 98295417441 = 320666^2 + 313521^2 .

It is a cyclic number.

It is not a de Polignac number, because 201122100997 - 2³ = 201122100989 is a prime.

It is a super-3 number, since 3×201122100997³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201122100947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100561050498 + 100561050499.

It is an arithmetic number, because the mean of its divisors is an integer number (100561050499).

Almost surely, 2^201122100997 is an apocalyptic number.

It is an amenable number.

201122100997 is a deficient number, since it is larger than the sum of its proper divisors (1).

201122100997 is an equidigital number, since it uses as much as digits as its factorization.

201122100997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 34.

The spelling of 201122100997 in words is "two hundred one billion, one hundred twenty-two million, one hundred thousand, nine hundred ninety-seven".