1120021220 has 24 divisors (see below), whose sum is σ = 2354352000. Its totient is φ = 447568992.

The previous prime is 1120021211. The next prime is 1120021247. The reversal of 1120021220 is 221200211.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6170 + ... + 47729.

It is an arithmetic number, because the mean of its divisors is an integer number (98098000).

Almost surely, 2^1120021220 is an apocalyptic number.

1120021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1120021220 is an abundant number, since it is smaller than the sum of its proper divisors (1234330780).

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

1120021220 is a wasteful number, since it uses less digits than its factorization.

1120021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54947 (or 54945 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1120021220 is about 33466.7180942500. The cubic root of 1120021220 is about 1038.5053789434.

Adding to 1120021220 its reverse (221200211), we get a palindrome (1341221431).

The spelling of 1120021220 in words is "one billion, one hundred twenty million, twenty-one thousand, two hundred twenty".