1001033220 has 96 divisors (see below), whose sum is σ = 3088181376. Its totient is φ = 240256000.

The previous prime is 1001033191. The next prime is 1001033263. The reversal of 1001033220 is 223301001.

It is a happy number.

1001033220 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1001033196 and 1001033205.

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, 59152 + ... + 74168.

It is an arithmetic number, because the mean of its divisors is an integer number (32168556).

Almost surely, 2^1001033220 is an apocalyptic number.

1001033220 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 1001033220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1544090688).

1001033220 is an abundant number, since it is smaller than the sum of its proper divisors (2087148156).

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

1001033220 is a wasteful number, since it uses less digits than its factorization.

1001033220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15141 (or 15139 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1001033220 is about 31639.1090266461. The cubic root of 1001033220 is about 1000.3442881188.

Adding to 1001033220 its reverse (223301001), we get a palindrome (1224334221).

The spelling of 1001033220 in words is "one billion, one million, thirty-three thousand, two hundred twenty".