21214211222 has 8 divisors (see below), whose sum is σ = 31860653400. Its totient is φ = 10593993424.

The previous prime is 21214211177. The next prime is 21214211231. The reversal of 21214211222 is 22211241212.

It is a happy number.

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 = 21214211194 and 21214211203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6554072 + ... + 6557307.

It is an arithmetic number, because the mean of its divisors is an integer number (3982581675).

Almost surely, 2^21214211222 is an apocalyptic number.

21214211222 is a deficient number, since it is larger than the sum of its proper divisors (10646442178).

21214211222 is a wasteful number, since it uses less digits than its factorization.

21214211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13112190.

The product of its digits is 256, while the sum is 20.

Adding to 21214211222 its reverse (22211241212), we get a palindrome (43425452434).

The spelling of 21214211222 in words is "twenty-one billion, two hundred fourteen million, two hundred eleven thousand, two hundred twenty-two".