1221222201099 has 8 divisors (see below), whose sum is σ = 1628383014720. Its totient is φ = 814104760776.

The previous prime is 1221222200903. The next prime is 1221222201127. The reversal of 1221222201099 is 9901022221221.

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

It is not a de Polignac number, because 1221222201099 - 2⁸ = 1221222200843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221222201299) 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, 10777569 + ... + 10890290.

It is an arithmetic number, because the mean of its divisors is an integer number (203547876840).

Almost surely, 2^{1221222201099} is an apocalyptic number.

1221222201099 is a deficient number, since it is larger than the sum of its proper divisors (407160813621).

1221222201099 is a wasteful number, since it uses less digits than its factorization.

1221222201099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21686649.

The product of its (nonzero) digits is 5184, while the sum is 33.

The spelling of 1221222201099 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred one thousand, ninety-nine".