21022112122 has 32 divisors (see below), whose sum is σ = 36454017600. Its totient is φ = 9000969600.

The previous prime is 21022112117. The next prime is 21022112143. The reversal of 21022112122 is 22121122012.

It is a happy number.

21022112122 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 21022112096 and 21022112105.

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 15 ways as a sum of consecutive naturals, for example, 375672 + ... + 427987.

It is an arithmetic number, because the mean of its divisors is an integer number (1139188050).

Almost surely, 2^21022112122 is an apocalyptic number.

21022112122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21022112122 is a deficient number, since it is larger than the sum of its proper divisors (15431905478).

21022112122 is a wasteful number, since it uses less digits than its factorization.

21022112122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803742.

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

Adding to 21022112122 its reverse (22121122012), we get a palindrome (43143234134).

The spelling of 21022112122 in words is "twenty-one billion, twenty-two million, one hundred twelve thousand, one hundred twenty-two".