21201100022 has 8 divisors (see below), whose sum is σ = 31829283072. Its totient is φ = 10591339000.

The previous prime is 21201100021. The next prime is 21201100033. The reversal of 21201100022 is 22000110212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21201099976 and 21201100012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201100021) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4602629 + ... + 4607232.

It is an arithmetic number, because the mean of its divisors is an integer number (3978660384).

Almost surely, 2^21201100022 is an apocalyptic number.

21201100022 is a deficient number, since it is larger than the sum of its proper divisors (10628183050).

21201100022 is a wasteful number, since it uses less digits than its factorization.

21201100022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9211014.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21201100022 its reverse (22000110212), we get a palindrome (43201210234).

The spelling of 21201100022 in words is "twenty-one billion, two hundred one million, one hundred thousand, twenty-two".