21101122222112 has 48 divisors (see below), whose sum is σ = 42092067376800. Its totient is φ = 10411700287488.

The previous prime is 21101122222111. The next prime is 21101122222121. The reversal of 21101122222112 is 21122222110112.

It is not an unprimeable number, because it can be changed into a prime (21101122222111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8718362 + ... + 10872537.

It is an arithmetic number, because the mean of its divisors is an integer number (876918070350).

Almost surely, 2^{21101122222112} is an apocalyptic number.

It is an amenable number.

21101122222112 is a deficient number, since it is larger than the sum of its proper divisors (20990945154688).

21101122222112 is a wasteful number, since it uses less digits than its factorization.

21101122222112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19591353 (or 19591345 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21101122222112 its reverse (21122222110112), we get a palindrome (42223344332224).

The spelling of 21101122222112 in words is "twenty-one trillion, one hundred one billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred twelve".