1011221122220 has 48 divisors (see below), whose sum is σ = 2152871693280. Its totient is φ = 398907219456.

The previous prime is 1011221122199. The next prime is 1011221122229. The reversal of 1011221122220 is 222211221101.

It is not an unprimeable number, because it can be changed into a prime (1011221122229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17401934 + ... + 17459946.

It is an arithmetic number, because the mean of its divisors is an integer number (44851493610).

Almost surely, 2^{1011221122220} is an apocalyptic number.

1011221122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011221122220 is an abundant number, since it is smaller than the sum of its proper divisors (1141650571060).

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

1011221122220 is a wasteful number, since it uses less digits than its factorization.

1011221122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70034 (or 70032 counting only the distinct ones).

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

Adding to 1011221122220 its reverse (222211221101), we get a palindrome (1233432343321).

The spelling of 1011221122220 in words is "one trillion, eleven billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred twenty".