20121111222 has 16 divisors (see below), whose sum is σ = 40246087872. Its totient is φ = 6706392840.

The previous prime is 20121111221. The next prime is 20121111233. The reversal of 20121111222 is 22211112102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121111221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91048 + ... + 220299.

It is an arithmetic number, because the mean of its divisors is an integer number (2515380492).

Almost surely, 2^20121111222 is an apocalyptic number.

20121111222 is an abundant number, since it is smaller than the sum of its proper divisors (20124976650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20121111222 is a wasteful number, since it uses less digits than its factorization.

20121111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322123.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20121111222 its reverse (22211112102), we get a palindrome (42332223324).

The spelling of 20121111222 in words is "twenty billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty-two".