22000001232 has 120 divisors (see below), whose sum is σ = 62543864992. Its totient is φ = 6658755840.

The previous prime is 22000001203. The next prime is 22000001237. The reversal of 22000001232 is 23210000022.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000001237) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6520698 + ... + 6524070.

Almost surely, 2^22000001232 is an apocalyptic number.

22000001232 is a gapful number since it is divisible by the number (22) 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 22000001232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31271932496).

22000001232 is an abundant number, since it is smaller than the sum of its proper divisors (40543863760).

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

22000001232 is a wasteful number, since it uses less digits than its factorization.

22000001232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4529 (or 4512 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 22000001232 its reverse (23210000022), we get a palindrome (45210001254).

The spelling of 22000001232 in words is "twenty-two billion, one thousand, two hundred thirty-two".