1222100032 has 42 divisors (see below), whose sum is σ = 2535198638. Its totient is φ = 584466432.

The previous prime is 1222100017. The next prime is 1222100039. The reversal of 1222100032 is 2300012221.

It can be written as a sum of positive squares in only one way, i.e., 855913536 + 366186496 = 29256^2 + 19136^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1222099985 and 1222100021.

It is not an unprimeable number, because it can be changed into a prime (1222100039) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15808 + ... + 51904.

Almost surely, 2^1222100032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222100032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1267599319).

1222100032 is an abundant number, since it is smaller than the sum of its proper divisors (1313098606).

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

1222100032 is an equidigital number, since it uses as much as digits as its factorization.

1222100032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36155 (or 36122 counting only the distinct ones).

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

The square root of 1222100032 is about 34958.5473382405. The cubic root of 1222100032 is about 1069.1424788719.

Adding to 1222100032 its reverse (2300012221), we get a palindrome (3522112253).

The spelling of 1222100032 in words is "one billion, two hundred twenty-two million, one hundred thousand, thirty-two".