121220122001999 has 2 divisors, whose sum is σ = 121220122002000. Its totient is φ = 121220122001998.

The previous prime is 121220122001917. The next prime is 121220122002061. The reversal of 121220122001999 is 999100221022121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121220122001999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121220122004999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610061000999 + 60610061001000.

It is an arithmetic number, because the mean of its divisors is an integer number (60610061001000).

Almost surely, 2^{121220122001999} is an apocalyptic number.

121220122001999 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220122001999 is an equidigital number, since it uses as much as digits as its factorization.

121220122001999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 41.

The spelling of 121220122001999 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, one thousand, nine hundred ninety-nine".