122220200001997 has 2 divisors, whose sum is σ = 122220200001998. Its totient is φ = 122220200001996.

The previous prime is 122220200001971. The next prime is 122220200002007. The reversal of 122220200001997 is 799100002022221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88626050767881 + 33594149234116 = 9414141^2 + 5796046^2 .

It is a cyclic number.

It is not a de Polignac number, because 122220200001997 - 2²³ = 122220191613389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122220200001797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61110100000998 + 61110100000999.

It is an arithmetic number, because the mean of its divisors is an integer number (61110100000999).

Almost surely, 2^{122220200001997} is an apocalyptic number.

It is an amenable number.

122220200001997 is a deficient number, since it is larger than the sum of its proper divisors (1).

122220200001997 is an equidigital number, since it uses as much as digits as its factorization.

122220200001997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 122220200001997 in words is "one hundred twenty-two trillion, two hundred twenty billion, two hundred million, one thousand, nine hundred ninety-seven".