101201211997 has 2 divisors, whose sum is σ = 101201211998. Its totient is φ = 101201211996.

The previous prime is 101201211977. The next prime is 101201212003. The reversal of 101201211997 is 799112102101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66558324121 + 34642887876 = 257989^2 + 186126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101201211997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101201211977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50600605998 + 50600605999.

It is an arithmetic number, because the mean of its divisors is an integer number (50600605999).

Almost surely, 2^101201211997 is an apocalyptic number.

It is an amenable number.

101201211997 is a deficient number, since it is larger than the sum of its proper divisors (1).

101201211997 is an equidigital number, since it uses as much as digits as its factorization.

101201211997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 34.

The spelling of 101201211997 in words is "one hundred one billion, two hundred one million, two hundred eleven thousand, nine hundred ninety-seven".