21213101222 has 8 divisors (see below), whose sum is σ = 31822612536. Its totient is φ = 10605563712.

The previous prime is 21213101219. The next prime is 21213101263. The reversal of 21213101222 is 22210131212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21213101222.

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, 466283 + ... + 509750.

It is an arithmetic number, because the mean of its divisors is an integer number (3977826567).

Almost surely, 2^21213101222 is an apocalyptic number.

21213101222 is a deficient number, since it is larger than the sum of its proper divisors (10609511314).

21213101222 is a wasteful number, since it uses less digits than its factorization.

21213101222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986902.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21213101222 its reverse (22210131212), we get a palindrome (43423232434).

The spelling of 21213101222 in words is "twenty-one billion, two hundred thirteen million, one hundred one thousand, two hundred twenty-two".