1102021220 has 48 divisors (see below), whose sum is σ = 2370428928. Its totient is φ = 430162560.

The previous prime is 1102021189. The next prime is 1102021231. The reversal of 1102021220 is 221202011.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358490 + ... + 361550.

It is an arithmetic number, because the mean of its divisors is an integer number (49383936).

Almost surely, 2^1102021220 is an apocalyptic number.

1102021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1102021220 is an abundant number, since it is smaller than the sum of its proper divisors (1268407708).

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

1102021220 is a wasteful number, since it uses less digits than its factorization.

1102021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500 (or 3498 counting only the distinct ones).

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

The square root of 1102021220 is about 33196.7049569682. The cubic root of 1102021220 is about 1032.9119907827.

Adding to 1102021220 its reverse (221202011), we get a palindrome (1323223231).

The spelling of 1102021220 in words is "one billion, one hundred two million, twenty-one thousand, two hundred twenty".