1022013220 has 12 divisors (see below), whose sum is σ = 2146227804. Its totient is φ = 408805280.

The previous prime is 1022013217. The next prime is 1022013221. The reversal of 1022013220 is 223102201.

It can be written as a sum of positive squares in 2 ways, for example, as 574944484 + 447068736 = 23978^2 + 21144^2 .

It is a super-2 number, since 2×1022013220² = 2089022043709536800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1022013220.

It is not an unprimeable number, because it can be changed into a prime (1022013221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25550311 + ... + 25550350.

It is an arithmetic number, because the mean of its divisors is an integer number (178852317).

Almost surely, 2^1022013220 is an apocalyptic number.

1022013220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022013220 is an abundant number, since it is smaller than the sum of its proper divisors (1124214584).

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

1022013220 is a wasteful number, since it uses less digits than its factorization.

1022013220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51100670 (or 51100668 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1022013220 is about 31968.9414901401. The cubic root of 1022013220 is about 1007.2845465313.

Adding to 1022013220 its reverse (223102201), we get a palindrome (1245115421).

The spelling of 1022013220 in words is "one billion, twenty-two million, thirteen thousand, two hundred twenty".