21213221100112 has 20 divisors (see below), whose sum is σ = 41215102287840. Its totient is φ = 10577065671008.

The previous prime is 21213221100103. The next prime is 21213221100161. The reversal of 21213221100112 is 21100112231212.

It is a self number, because there is not a number n which added to its sum of digits gives 21213221100112.

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, 1846549018 + ... + 1846560505.

It is an arithmetic number, because the mean of its divisors is an integer number (2060755114392).

Almost surely, 2^{21213221100112} is an apocalyptic number.

It is an amenable number.

21213221100112 is a deficient number, since it is larger than the sum of its proper divisors (20001881187728).

21213221100112 is a wasteful number, since it uses less digits than its factorization.

21213221100112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3693109890 (or 3693109884 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21213221100112 its reverse (21100112231212), we get a palindrome (42313333331324).

The spelling of 21213221100112 in words is "twenty-one trillion, two hundred thirteen billion, two hundred twenty-one million, one hundred thousand, one hundred twelve".