221233100022 has 48 divisors (see below), whose sum is σ = 553674290832. Its totient is φ = 63096783360.

The previous prime is 221233100021. The next prime is 221233100059. The reversal of 221233100022 is 220001332122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221233099968 and 221233100004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221233100021) 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, 32859543 + ... + 32866274.

It is an arithmetic number, because the mean of its divisors is an integer number (11534881059).

Almost surely, 2^221233100022 is an apocalyptic number.

221233100022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221233100022 is an abundant number, since it is smaller than the sum of its proper divisors (332441190810).

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

221233100022 is a wasteful number, since it uses less digits than its factorization.

221233100022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65725853 (or 65725850 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 221233100022 its reverse (220001332122), we get a palindrome (441234432144).

The spelling of 221233100022 in words is "two hundred twenty-one billion, two hundred thirty-three million, one hundred thousand, twenty-two".