1021130220 has 96 divisors (see below), whose sum is σ = 3129025536. Its totient is φ = 246758400.

The previous prime is 1021130219. The next prime is 1021130233. The reversal of 1021130220 is 220311201.

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 = 1021130196 and 1021130205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220125 + ... + 224715.

It is an arithmetic number, because the mean of its divisors is an integer number (32594016).

Almost surely, 2^1021130220 is an apocalyptic number.

1021130220 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 1021130220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1564512768).

1021130220 is an abundant number, since it is smaller than the sum of its proper divisors (2107895316).

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

1021130220 is a wasteful number, since it uses less digits than its factorization.

1021130220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4951 (or 4949 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1021130220 is about 31955.1282269372. The cubic root of 1021130220 is about 1006.9943713779.

Adding to 1021130220 its reverse (220311201), we get a palindrome (1241441421).

The spelling of 1021130220 in words is "one billion, twenty-one million, one hundred thirty thousand, two hundred twenty".