1111221122220 has 96 divisors (see below), whose sum is σ = 3771417162240. Its totient is φ = 269386937280.

The previous prime is 1111221122149. The next prime is 1111221122279. The reversal of 1111221122220 is 222211221111.

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 = 1111221122193 and 1111221122202.

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 31 ways as a sum of consecutive naturals, for example, 93531192 + ... + 93543071.

It is an arithmetic number, because the mean of its divisors is an integer number (39285595440).

Almost surely, 2^{1111221122220} is an apocalyptic number.

1111221122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111221122220 is an abundant number, since it is smaller than the sum of its proper divisors (2660196040020).

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

1111221122220 is a wasteful number, since it uses less digits than its factorization.

1111221122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187074292 (or 187074284 counting only the distinct ones).

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

Adding to 1111221122220 its reverse (222211221111), we get a palindrome (1333432343331).

The spelling of 1111221122220 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred twenty".