1222135500 has 96 divisors (see below), whose sum is σ = 3572674560. Its totient is φ = 324638400.

The previous prime is 1222135477. The next prime is 1222135513. The reversal of 1222135500 is 55312221.

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, 423061 + ... + 425939.

It is an arithmetic number, because the mean of its divisors is an integer number (37215360).

Almost surely, 2^1222135500 is an apocalyptic number.

1222135500 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 1222135500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1786337280).

1222135500 is an abundant number, since it is smaller than the sum of its proper divisors (2350539060).

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

1222135500 is a wasteful number, since it uses less digits than its factorization.

1222135500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184 (or 3172 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1222135500 is about 34959.0546210849. The cubic root of 1222135500 is about 1069.1528217182.

Adding to 1222135500 its reverse (55312221), we get a palindrome (1277447721).

The spelling of 1222135500 in words is "one billion, two hundred twenty-two million, one hundred thirty-five thousand, five hundred".