1212122200999 has 16 divisors (see below), whose sum is σ = 1226329632000. Its totient is φ = 1197998426560.

The previous prime is 1212122200987. The next prime is 1212122201029. The reversal of 1212122200999 is 9990022212121.

It is a cyclic number.

It is not a de Polignac number, because 1212122200999 - 2⁵ = 1212122200967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212122200979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38030532 + ... + 38062390.

It is an arithmetic number, because the mean of its divisors is an integer number (76645602000).

Almost surely, 2^{1212122200999} is an apocalyptic number.

1212122200999 is a deficient number, since it is larger than the sum of its proper divisors (14207431001).

1212122200999 is a wasteful number, since it uses less digits than its factorization.

1212122200999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33158.

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 1212122200999 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, two hundred thousand, nine hundred ninety-nine".