111211210012 has 24 divisors (see below), whose sum is σ = 222898725504. Its totient is φ = 47559881712.

The previous prime is 111211210007. The next prime is 111211210037. The reversal of 111211210012 is 210012112111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 111211209974 and 111211210001.

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, 4239418 + ... + 4265569.

It is an arithmetic number, because the mean of its divisors is an integer number (9287446896).

Almost surely, 2^111211210012 is an apocalyptic number.

It is an amenable number.

111211210012 is an abundant number, since it is smaller than the sum of its proper divisors (111687515492).

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

111211210012 is a wasteful number, since it uses less digits than its factorization.

111211210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8505465 (or 8505463 counting only the distinct ones).

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

Adding to 111211210012 its reverse (210012112111), we get a palindrome (321223322123).

The spelling of 111211210012 in words is "one hundred eleven billion, two hundred eleven million, two hundred ten thousand, twelve".