1200022121999 has 2 divisors, whose sum is σ = 1200022122000. Its totient is φ = 1200022121998.

The previous prime is 1200022121989. The next prime is 1200022122067. The reversal of 1200022121999 is 9991212200021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1200022121999 - 2¹⁶ = 1200022056463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200022121989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600011060999 + 600011061000.

It is an arithmetic number, because the mean of its divisors is an integer number (600011061000).

Almost surely, 2^{1200022121999} is an apocalyptic number.

1200022121999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200022121999 is an equidigital number, since it uses as much as digits as its factorization.

1200022121999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 1200022121999 in words is "one trillion, two hundred billion, twenty-two million, one hundred twenty-one thousand, nine hundred ninety-nine".