1101220220 has 96 divisors (see below), whose sum is σ = 2604244608. Its totient is φ = 388923392.

The previous prime is 1101220193. The next prime is 1101220247. The reversal of 1101220220 is 220221011.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1101220193) and next prime (1101220247).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 413132 + ... + 415788.

It is an arithmetic number, because the mean of its divisors is an integer number (27127548).

Almost surely, 2^1101220220 is an apocalyptic number.

1101220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1101220220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1302122304).

1101220220 is an abundant number, since it is smaller than the sum of its proper divisors (1503024388).

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

1101220220 is a wasteful number, since it uses less digits than its factorization.

1101220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2759 (or 2757 counting only the distinct ones).

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

The square root of 1101220220 is about 33184.6383135330. The cubic root of 1101220220 is about 1032.6616740539.

Adding to 1101220220 its reverse (220221011), we get a palindrome (1321441231).

The spelling of 1101220220 in words is "one billion, one hundred one million, two hundred twenty thousand, two hundred twenty".