1100101220 has 24 divisors (see below), whose sum is σ = 2311352064. Its totient is φ = 439823456.

The previous prime is 1100101199. The next prime is 1100101271. The reversal of 1100101220 is 221010011.

It is a junction number, because it is equal to n+sod(n) for n = 1100101198 and 1100101207.

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, 31679 + ... + 56601.

It is an arithmetic number, because the mean of its divisors is an integer number (96306336).

Almost surely, 2^1100101220 is an apocalyptic number.

1100101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100101220 is an abundant number, since it is smaller than the sum of its proper divisors (1211250844).

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

1100101220 is a wasteful number, since it uses less digits than its factorization.

1100101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27139 (or 27137 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1100101220 is about 33167.7738173668. The cubic root of 1100101220 is about 1032.3117773317.

Adding to 1100101220 its reverse (221010011), we get a palindrome (1321111231).

The spelling of 1100101220 in words is "one billion, one hundred million, one hundred one thousand, two hundred twenty".