21232221032 has 32 divisors (see below), whose sum is σ = 44248978080. Its totient is φ = 9468912960.

The previous prime is 21232220981. The next prime is 21232221041. The reversal of 21232221032 is 23012223212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21232220995 and 21232221013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2271518 + ... + 2280845.

It is an arithmetic number, because the mean of its divisors is an integer number (1382780565).

Almost surely, 2^21232221032 is an apocalyptic number.

21232221032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21232221032 is an abundant number, since it is smaller than the sum of its proper divisors (23016757048).

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

21232221032 is a wasteful number, since it uses less digits than its factorization.

21232221032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4552433 (or 4552429 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21232221032 its reverse (23012223212), we get a palindrome (44244444244).

The spelling of 21232221032 in words is "twenty-one billion, two hundred thirty-two million, two hundred twenty-one thousand, thirty-two".