1221022022209 has 8 divisors (see below), whose sum is σ = 1344244429440. Its totient is φ = 1099836349200.

The previous prime is 1221022022201. The next prime is 1221022022279. The reversal of 1221022022209 is 9022202201221.

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 1221022022209 - 2³ = 1221022022201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221022022201) 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, 509182297 + ... + 509184694.

It is an arithmetic number, because the mean of its divisors is an integer number (168030553680).

Almost surely, 2^{1221022022209} is an apocalyptic number.

It is an amenable number.

1221022022209 is a deficient number, since it is larger than the sum of its proper divisors (123222407231).

1221022022209 is a wasteful number, since it uses less digits than its factorization.

1221022022209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018367111.

The product of its (nonzero) digits is 1152, while the sum is 25.

The spelling of 1221022022209 in words is "one trillion, two hundred twenty-one billion, twenty-two million, twenty-two thousand, two hundred nine".