1100022121221 has 32 divisors (see below), whose sum is σ = 1477254451200. Its totient is φ = 728090475840.

The previous prime is 1100022121151. The next prime is 1100022121259. The reversal of 1100022121221 is 1221212200011.

It is not a de Polignac number, because 1100022121221 - 2²³ = 1100013732613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1100022121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100022121291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 600775776 + ... + 600777606.

It is an arithmetic number, because the mean of its divisors is an integer number (46164201600).

Almost surely, 2^{1100022121221} is an apocalyptic number.

It is an amenable number.

1100022121221 is a deficient number, since it is larger than the sum of its proper divisors (377232329979).

1100022121221 is a wasteful number, since it uses less digits than its factorization.

1100022121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4049.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1100022121221 its reverse (1221212200011), we get a palindrome (2321234321232).

The spelling of 1100022121221 in words is "one trillion, one hundred billion, twenty-two million, one hundred twenty-one thousand, two hundred twenty-one".