1001102220 has 192 divisors, whose sum is σ = 3260006400. Its totient is φ = 254741760.

The previous prime is 1001102197. The next prime is 1001102231. The reversal of 1001102220 is 222011001.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1322082 + ... + 1322838.

It is an arithmetic number, because the mean of its divisors is an integer number (16979200).

Almost surely, 2^1001102220 is an apocalyptic number.

1001102220 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 1001102220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1630003200).

1001102220 is an abundant number, since it is smaller than the sum of its proper divisors (2258904180).

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

1001102220 is a wasteful number, since it uses less digits than its factorization.

1001102220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885 (or 877 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1001102220 is about 31640.1994304714. The cubic root of 1001102220 is about 1000.3672717616.

Adding to 1001102220 its reverse (222011001), we get a palindrome (1223113221).

The spelling of 1001102220 in words is "one billion, one million, one hundred two thousand, two hundred twenty".