22011121212012 has 24 divisors (see below), whose sum is σ = 57065869809200. Its totient is φ = 7337040403968.

The previous prime is 22011121211903. The next prime is 22011121212013. The reversal of 22011121212012 is 21021212111022.

22011121212012 is a `hidden beast` number, since 220 + 111 + 212 + 120 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22011121212013) 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, 101903338837 + ... + 101903339052.

Almost surely, 2^{22011121212012} is an apocalyptic number.

It is an amenable number.

22011121212012 is an abundant number, since it is smaller than the sum of its proper divisors (35054748597188).

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

22011121212012 is a wasteful number, since it uses less digits than its factorization.

22011121212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203806677902 (or 203806677894 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 22011121212012 its reverse (21021212111022), we get a palindrome (43032333323034).

The spelling of 22011121212012 in words is "twenty-two trillion, eleven billion, one hundred twenty-one million, two hundred twelve thousand, twelve".