111111101012 has 24 divisors (see below), whose sum is σ = 197018332896. Its totient is φ = 54821721888.

The previous prime is 111111100981. The next prime is 111111101029. The reversal of 111111101012 is 210101111111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 111111100984 and 111111101002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87023 + ... + 479369.

It is an arithmetic number, because the mean of its divisors is an integer number (8209097204).

Almost surely, 2^111111101012 is an apocalyptic number.

It is an amenable number.

111111101012 is a deficient number, since it is larger than the sum of its proper divisors (85907231884).

111111101012 is a wasteful number, since it uses less digits than its factorization.

111111101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393287 (or 393285 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 111111101012 its reverse (210101111111), we get a palindrome (321212212123).

The spelling of 111111101012 in words is "one hundred eleven billion, one hundred eleven million, one hundred one thousand, twelve".