21233102220 has 72 divisors (see below), whose sum is σ = 70262272080. Its totient is φ = 5147418240.

The previous prime is 21233102213. The next prime is 21233102237. The reversal of 21233102220 is 2220133212.

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 = 21233102193 and 21233102202.

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 23 ways as a sum of consecutive naturals, for example, 5359915 + ... + 5363874.

It is an arithmetic number, because the mean of its divisors is an integer number (975864890).

Almost surely, 2^21233102220 is an apocalyptic number.

21233102220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21233102220 is an abundant number, since it is smaller than the sum of its proper divisors (49029169860).

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

21233102220 is a wasteful number, since it uses less digits than its factorization.

21233102220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10723815 (or 10723810 counting only the distinct ones).

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

Adding to 21233102220 its reverse (2220133212), we get a palindrome (23453235432).

The spelling of 21233102220 in words is "twenty-one billion, two hundred thirty-three million, one hundred two thousand, two hundred twenty".