21311101222 has 8 divisors (see below), whose sum is σ = 32210672472. Its totient is φ = 10574210400.

The previous prime is 21311101183. The next prime is 21311101223. The reversal of 21311101222 is 22210111312.

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 = 21311101196 and 21311101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311101223) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 40669779 + ... + 40670302.

It is an arithmetic number, because the mean of its divisors is an integer number (4026334059).

Almost surely, 2^21311101222 is an apocalyptic number.

21311101222 is a deficient number, since it is larger than the sum of its proper divisors (10899571250).

21311101222 is a wasteful number, since it uses less digits than its factorization.

21311101222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81340214.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21311101222 its reverse (22210111312), we get a palindrome (43521212534).

The spelling of 21311101222 in words is "twenty-one billion, three hundred eleven million, one hundred one thousand, two hundred twenty-two".