1201122221999 has 8 divisors (see below), whose sum is σ = 1416992114688. Its totient is φ = 996322580280.

The previous prime is 1201122221987. The next prime is 1201122222217. The reversal of 1201122221999 is 9991222211021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1201122221999 - 2³⁶ = 1132402745263 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 (1201122221699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2767562507 + ... + 2767562940.

It is an arithmetic number, because the mean of its divisors is an integer number (177124014336).

Almost surely, 2^{1201122221999} is an apocalyptic number.

1201122221999 is a deficient number, since it is larger than the sum of its proper divisors (215869892689).

1201122221999 is an equidigital number, since it uses as much as digits as its factorization.

1201122221999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5535125485.

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

The spelling of 1201122221999 in words is "one trillion, two hundred one billion, one hundred twenty-two million, two hundred twenty-one thousand, nine hundred ninety-nine".