201997212449 has 2 divisors, whose sum is σ = 201997212450. Its totient is φ = 201997212448.

The previous prime is 201997212421. The next prime is 201997212563. The reversal of 201997212449 is 944212799102.

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., 190549710400 + 11447502049 = 436520^2 + 106993^2 .

It is a cyclic number.

It is not a de Polignac number, because 201997212449 - 2³⁶ = 133277735713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201997212397 and 201997212406.

It is not a weakly prime, because it can be changed into another prime (201997212409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100998606224 + 100998606225.

It is an arithmetic number, because the mean of its divisors is an integer number (100998606225).

Almost surely, 2^201997212449 is an apocalyptic number.

It is an amenable number.

201997212449 is a deficient number, since it is larger than the sum of its proper divisors (1).

201997212449 is an equidigital number, since it uses as much as digits as its factorization.

201997212449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 201997212449 in words is "two hundred one billion, nine hundred ninety-seven million, two hundred twelve thousand, four hundred forty-nine".