1112221211220 has 72 divisors (see below), whose sum is σ = 3855700203264. Its totient is φ = 254221990848.

The previous prime is 1112221211203. The next prime is 1112221211317. The reversal of 1112221211220 is 221121222111.

1112221211220 is a `hidden beast` number, since 1 + 1 + 12 + 221 + 211 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1112221211193 and 1112221211202.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 441356364 + ... + 441358883.

It is an arithmetic number, because the mean of its divisors is an integer number (53551391712).

Almost surely, 2^{1112221211220} is an apocalyptic number.

1112221211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1112221211220 is an abundant number, since it is smaller than the sum of its proper divisors (2743478992044).

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

1112221211220 is a wasteful number, since it uses less digits than its factorization.

1112221211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882715269 (or 882715264 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1112221211220 its reverse (221121222111), we get a palindrome (1333342433331).

The spelling of 1112221211220 in words is "one trillion, one hundred twelve billion, two hundred twenty-one million, two hundred eleven thousand, two hundred twenty".