111212221200111 has 12 divisors (see below), whose sum is σ = 160640821668600. Its totient is φ = 74141043906960.

The previous prime is 111212221200097. The next prime is 111212221200127. The reversal of 111212221200111 is 111002122212111.

It is a happy number.

111212221200111 is a `hidden beast` number, since 11 + 121 + 2 + 221 + 200 + 111 = 666.

It is not a de Polignac number, because 111212221200111 - 2¹³ = 111212221191919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212221200151) 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, 34791820 + ... + 37853601.

It is an arithmetic number, because the mean of its divisors is an integer number (13386735139050).

Almost surely, 2^{111212221200111} is an apocalyptic number.

111212221200111 is a deficient number, since it is larger than the sum of its proper divisors (49428600468489).

111212221200111 is a wasteful number, since it uses less digits than its factorization.

111212221200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72815526 (or 72815523 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111212221200111 its reverse (111002122212111), we get a palindrome (222214343412222).

The spelling of 111212221200111 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred twenty-one million, two hundred thousand, one hundred eleven".