21102112112222 has 16 divisors (see below), whose sum is σ = 33038375837472. Its totient is φ = 10089569693280.

The previous prime is 21102112112209. The next prime is 21102112112227. The reversal of 21102112112222 is 22221121120112.

It is a junction number, because it is equal to n+sod(n) for n = 21102112112194 and 21102112112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102112112227) 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, 62210729 + ... + 62549012.

It is an arithmetic number, because the mean of its divisors is an integer number (2064898489842).

Almost surely, 2^{21102112112222} is an apocalyptic number.

21102112112222 is a deficient number, since it is larger than the sum of its proper divisors (11936263725250).

21102112112222 is a wasteful number, since it uses less digits than its factorization.

21102112112222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124763443.

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

Adding to 21102112112222 its reverse (22221121120112), we get a palindrome (43323233232334).

The spelling of 21102112112222 in words is "twenty-one trillion, one hundred two billion, one hundred twelve million, one hundred twelve thousand, two hundred twenty-two".