21113220022 has 4 divisors (see below), whose sum is σ = 31669830036. Its totient is φ = 10556610010.

The previous prime is 21113219983. The next prime is 21113220043. The reversal of 21113220022 is 22002231112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21113219978 and 21113220005.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 5278305004 + ... + 5278305007.

It is an arithmetic number, because the mean of its divisors is an integer number (7917457509).

Almost surely, 2^21113220022 is an apocalyptic number.

21113220022 is a deficient number, since it is larger than the sum of its proper divisors (10556610014).

21113220022 is a wasteful number, since it uses less digits than its factorization.

21113220022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10556610013.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21113220022 its reverse (22002231112), we get a palindrome (43115451134).

The spelling of 21113220022 in words is "twenty-one billion, one hundred thirteen million, two hundred twenty thousand, twenty-two".