221122231232 has 56 divisors (see below), whose sum is σ = 513704738400. Its totient is φ = 92455280640.

The previous prime is 221122231217. The next prime is 221122231243. The reversal of 221122231232 is 232132221122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×221122231232² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221122231198 and 221122231207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6000857 + ... + 6037592.

It is an arithmetic number, because the mean of its divisors is an integer number (9173298900).

Almost surely, 2^221122231232 is an apocalyptic number.

It is an amenable number.

221122231232 is an abundant number, since it is smaller than the sum of its proper divisors (292582507168).

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

221122231232 is a wasteful number, since it uses less digits than its factorization.

221122231232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12038509 (or 12038499 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

Adding to 221122231232 its reverse (232132221122), we get a palindrome (453254452354).

The spelling of 221122231232 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred thirty-one thousand, two hundred thirty-two".