1221220022099 has 8 divisors (see below), whose sum is σ = 1522560027648. Its totient is φ = 951600017160.

The previous prime is 1221220022083. The next prime is 1221220022101. The reversal of 1221220022099 is 9902200221221.

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 1221220022099 - 2⁴ = 1221220022083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221220322099) 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, 7930000067 + ... + 7930000220.

It is an arithmetic number, because the mean of its divisors is an integer number (190320003456).

Almost surely, 2^{1221220022099} is an apocalyptic number.

1221220022099 is a deficient number, since it is larger than the sum of its proper divisors (301340005549).

1221220022099 is a wasteful number, since it uses less digits than its factorization.

1221220022099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15860000305.

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 1221220022099 in words is "one trillion, two hundred twenty-one billion, two hundred twenty million, twenty-two thousand, ninety-nine".