121221022212197 has 2 divisors, whose sum is σ = 121221022212198. Its totient is φ = 121221022212196.

The previous prime is 121221022212067. The next prime is 121221022212209. The reversal of 121221022212197 is 791212220122121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120930292042561 + 290730169636 = 10996831^2 + 539194^2 .

It is a cyclic number.

It is not a de Polignac number, because 121221022212197 - 2¹² = 121221022208101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121221022272197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610511106098 + 60610511106099.

It is an arithmetic number, because the mean of its divisors is an integer number (60610511106099).

Almost surely, 2^{121221022212197} is an apocalyptic number.

It is an amenable number.

121221022212197 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221022212197 is an equidigital number, since it uses as much as digits as its factorization.

121221022212197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 35.

The spelling of 121221022212197 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-two million, two hundred twelve thousand, one hundred ninety-seven".