20111122221222 has 32 divisors (see below), whose sum is σ = 42007439605248. Its totient is φ = 6406680462336.

The previous prime is 20111122221191. The next prime is 20111122221241. The reversal of 20111122221222 is 22212222111102.

It is a super-2 number, since 2×20111122221222² (a number of 27 digits) 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 15 ways as a sum of consecutive naturals, for example, 63038098 + ... + 63356325.

It is an arithmetic number, because the mean of its divisors is an integer number (1312732487664).

Almost surely, 2^{20111122221222} is an apocalyptic number.

20111122221222 is an abundant number, since it is smaller than the sum of its proper divisors (21896317384026).

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

20111122221222 is a wasteful number, since it uses less digits than its factorization.

20111122221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126395604.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 20111122221222 its reverse (22212222111102), we get a palindrome (42323344332324).

The spelling of 20111122221222 in words is "twenty trillion, one hundred eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty-two".