1111022221220 has 12 divisors (see below), whose sum is σ = 2333146664604. Its totient is φ = 444408888480.

The previous prime is 1111022221217. The next prime is 1111022221247. The reversal of 1111022221220 is 221222201111.

It can be written as a sum of positive squares in 2 ways, for example, as 801601483684 + 309420737536 = 895322^2 + 556256^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27775555511 + ... + 27775555550.

It is an arithmetic number, because the mean of its divisors is an integer number (194428888717).

Almost surely, 2^{1111022221220} is an apocalyptic number.

1111022221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111022221220 is an abundant number, since it is smaller than the sum of its proper divisors (1222124443384).

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

1111022221220 is a wasteful number, since it uses less digits than its factorization.

1111022221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55551111070 (or 55551111068 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1111022221220 its reverse (221222201111), we get a palindrome (1332244422331).

The spelling of 1111022221220 in words is "one trillion, one hundred eleven billion, twenty-two million, two hundred twenty-one thousand, two hundred twenty".