201220111297 has 2 divisors, whose sum is σ = 201220111298. Its totient is φ = 201220111296.

The previous prime is 201220111291. The next prime is 201220111307. The reversal of 201220111297 is 792111022102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188009827201 + 13210284096 = 433601^2 + 114936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201220111297 is a prime.

It is not a weakly prime, because it can be changed into another prime (201220111291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610055648 + 100610055649.

It is an arithmetic number, because the mean of its divisors is an integer number (100610055649).

Almost surely, 2^201220111297 is an apocalyptic number.

It is an amenable number.

201220111297 is a deficient number, since it is larger than the sum of its proper divisors (1).

201220111297 is an equidigital number, since it uses as much as digits as its factorization.

201220111297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 28.

Adding to 201220111297 its reverse (792111022102), we get a palindrome (993331133399).

The spelling of 201220111297 in words is "two hundred one billion, two hundred twenty million, one hundred eleven thousand, two hundred ninety-seven".