121022120221997 has 2 divisors, whose sum is σ = 121022120221998. Its totient is φ = 121022120221996.

The previous prime is 121022120221949. The next prime is 121022120222011. The reversal of 121022120221997 is 799122021220121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117505036320676 + 3517083901321 = 10839974^2 + 1875389^2 .

It is a cyclic number.

It is not a de Polignac number, because 121022120221997 - 2¹⁶ = 121022120156461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121022120421997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60511060110998 + 60511060110999.

It is an arithmetic number, because the mean of its divisors is an integer number (60511060110999).

Almost surely, 2^{121022120221997} is an apocalyptic number.

It is an amenable number.

121022120221997 is a deficient number, since it is larger than the sum of its proper divisors (1).

121022120221997 is an equidigital number, since it uses as much as digits as its factorization.

121022120221997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 41.

The spelling of 121022120221997 in words is "one hundred twenty-one trillion, twenty-two billion, one hundred twenty million, two hundred twenty-one thousand, nine hundred ninety-seven".