21112122022 has 8 divisors (see below), whose sum is σ = 31750868736. Its totient is φ = 10528499112.

The previous prime is 21112121999. The next prime is 21112122079. The reversal of 21112122022 is 22022121112.

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 = 21112121987 and 21112122005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13779993 + ... + 13781524.

It is an arithmetic number, because the mean of its divisors is an integer number (3968858592).

Almost surely, 2^21112122022 is an apocalyptic number.

21112122022 is a deficient number, since it is larger than the sum of its proper divisors (10638746714).

21112122022 is a wasteful number, since it uses less digits than its factorization.

21112122022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27561902.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21112122022 its reverse (22022121112), we get a palindrome (43134243134).

The spelling of 21112122022 in words is "twenty-one billion, one hundred twelve million, one hundred twenty-two thousand, twenty-two".