121222099997 has 2 divisors, whose sum is σ = 121222099998. Its totient is φ = 121222099996.

The previous prime is 121222099993. The next prime is 121222100029. The reversal of 121222099997 is 799990222121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120779881156 + 442218841 = 347534^2 + 21029^2 .

It is a cyclic number.

It is not a de Polignac number, because 121222099997 - 2² = 121222099993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121222099993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60611049998 + 60611049999.

It is an arithmetic number, because the mean of its divisors is an integer number (60611049999).

Almost surely, 2^121222099997 is an apocalyptic number.

It is an amenable number.

121222099997 is a deficient number, since it is larger than the sum of its proper divisors (1).

121222099997 is an equidigital number, since it uses as much as digits as its factorization.

121222099997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 53.

The spelling of 121222099997 in words is "one hundred twenty-one billion, two hundred twenty-two million, ninety-nine thousand, nine hundred ninety-seven".