20111222 has 8 divisors (see below), whose sum is σ = 30188376. Its totient is φ = 10048432.

The previous prime is 20111213. The next prime is 20111243. The reversal of 20111222 is 22211102.

It is a happy number.

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

It is a super-2 number, since 2×20111222² = 808922500666568, which contains 22 as substring.

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, 1178 + ... + 6450.

It is an arithmetic number, because the mean of its divisors is an integer number (3773547).

Almost surely, 2^20111222 is an apocalyptic number.

20111222 is a deficient number, since it is larger than the sum of its proper divisors (10077154).

20111222 is a wasteful number, since it uses less digits than its factorization.

20111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7182.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 20111222 is about 4484.5537124668. The cubic root of 20111222 is about 271.9440033949.

Adding to 20111222 its reverse (22211102), we get a palindrome (42322324).

The spelling of 20111222 in words is "twenty million, one hundred eleven thousand, two hundred twenty-two".