1221222133110 has 32 divisors (see below), whose sum is σ = 3349637851392. Its totient is φ = 279136487520.

The previous prime is 1221222133097. The next prime is 1221222133111. The reversal of 1221222133110 is 113312221221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221222133111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2907671536 + ... + 2907671955.

It is an arithmetic number, because the mean of its divisors is an integer number (104676182856).

Almost surely, 2^{1221222133110} is an apocalyptic number.

1221222133110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221222133110 is an abundant number, since it is smaller than the sum of its proper divisors (2128415718282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221222133110 is a wasteful number, since it uses less digits than its factorization.

1221222133110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5815343508.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1221222133110 its reverse (113312221221), we get a palindrome (1334534354331).

The spelling of 1221222133110 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-two million, one hundred thirty-three thousand, one hundred ten".