1221120222199 has 8 divisors (see below), whose sum is σ = 1240751982240. Its totient is φ = 1201556042400.

The previous prime is 1221120222149. The next prime is 1221120222209. The reversal of 1221120222199 is 9912220211221.

It is a happy number.

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 1221120222199 - 2⁷ = 1221120222071 is a prime.

It is a super-2 number, since 2×1221120222199² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221120222149) 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, 16858632 + ... + 16930909.

It is an arithmetic number, because the mean of its divisors is an integer number (155093997780).

Almost surely, 2^{1221120222199} is an apocalyptic number.

1221120222199 is a deficient number, since it is larger than the sum of its proper divisors (19631760041).

1221120222199 is an equidigital number, since it uses as much as digits as its factorization.

1221120222199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33790121.

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 1221120222199 in words is "one trillion, two hundred twenty-one billion, one hundred twenty million, two hundred twenty-two thousand, one hundred ninety-nine".