111011221012 has 12 divisors (see below), whose sum is σ = 194294367316. Its totient is φ = 55498544640.

The previous prime is 111011220989. The next prime is 111011221051. The reversal of 111011221012 is 210122110111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13408713616 + 97602507396 = 115796^2 + 312414^2 .

It is a super-2 number, since 2×111011221012² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111011220983 and 111011221001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1731039 + ... + 1794022.

Almost surely, 2^111011221012 is an apocalyptic number.

It is an amenable number.

111011221012 is a deficient number, since it is larger than the sum of its proper divisors (83283146304).

111011221012 is a wasteful number, since it uses less digits than its factorization.

111011221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3532938 (or 3532936 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111011221012 its reverse (210122110111), we get a palindrome (321133331123).

The spelling of 111011221012 in words is "one hundred eleven billion, eleven million, two hundred twenty-one thousand, twelve".