111111321212 has 12 divisors (see below), whose sum is σ = 194458788216. Its totient is φ = 55551667440.

The previous prime is 111111321169. The next prime is 111111321221. The reversal of 111111321212 is 212123111111.

It is a super-2 number, since 2×111111321212² (a number of 23 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 3 ways as a sum of consecutive naturals, for example, 935243 + ... + 1047330.

It is an arithmetic number, because the mean of its divisors is an integer number (16204899018).

Almost surely, 2^111111321212 is an apocalyptic number.

It is an amenable number.

111111321212 is a deficient number, since it is larger than the sum of its proper divisors (83347467004).

111111321212 is a wasteful number, since it uses less digits than its factorization.

111111321212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996588 (or 1996586 counting only the distinct ones).

The product of its digits is 24, while the sum is 17.

Adding to 111111321212 its reverse (212123111111), we get a palindrome (323234432323).

The spelling of 111111321212 in words is "one hundred eleven billion, one hundred eleven million, three hundred twenty-one thousand, two hundred twelve".