111222201222100 has 36 divisors (see below), whose sum is σ = 241353725733148. Its totient is φ = 44488594944000.

The previous prime is 111222201222043. The next prime is 111222201222107. The reversal of 111222201222100 is 1222102222111.

It can be written as a sum of positive squares in 6 ways, for example, as 40702817775376 + 70519383446724 = 6379876^2 + 8397582^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222201222107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12446470 + ... + 19425730.

Almost surely, 2^{111222201222100} is an apocalyptic number.

111222201222100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111222201222100 is an abundant number, since it is smaller than the sum of its proper divisors (130131524511048).

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

111222201222100 is a wasteful number, since it uses less digits than its factorization.

111222201222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7138636 (or 7138629 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 111222201222100 its reverse (1222102222111), we get a palindrome (112444303444211).

The spelling of 111222201222100 in words is "one hundred eleven trillion, two hundred twenty-two billion, two hundred one million, two hundred twenty-two thousand, one hundred".