1222535020 has 96 divisors (see below), whose sum is σ = 3060449280. Its totient is φ = 401345280.

The previous prime is 1222534927. The next prime is 1222535053. The reversal of 1222535020 is 205352221.

It is a junction number, because it is equal to n+sod(n) for n = 1222534982 and 1222535000.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 514435 + ... + 516805.

It is an arithmetic number, because the mean of its divisors is an integer number (31879680).

Almost surely, 2^1222535020 is an apocalyptic number.

1222535020 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 1222535020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1530224640).

1222535020 is an abundant number, since it is smaller than the sum of its proper divisors (1837914260).

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

1222535020 is a wasteful number, since it uses less digits than its factorization.

1222535020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543 (or 2541 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 1222535020 is about 34964.7682675004. The cubic root of 1222535020 is about 1069.2693121833.

Adding to 1222535020 its reverse (205352221), we get a palindrome (1427887241).

The spelling of 1222535020 in words is "one billion, two hundred twenty-two million, five hundred thirty-five thousand, twenty".