111121111021012 has 12 divisors (see below), whose sum is σ = 194478712665300. Its totient is φ = 55555764545216.

The previous prime is 111121111020991. The next prime is 111121111021013. The reversal of 111121111021012 is 210120111121111.

It can be written as a sum of positive squares in 2 ways, for example, as 100111150869136 + 11009960151876 = 10005556^2 + 3318126^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121111021013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1197689137 + ... + 1197781912.

It is an arithmetic number, because the mean of its divisors is an integer number (16206559388775).

Almost surely, 2^{111121111021012} is an apocalyptic number.

It is an amenable number.

111121111021012 is a deficient number, since it is larger than the sum of its proper divisors (83357601644288).

111121111021012 is a wasteful number, since it uses less digits than its factorization.

111121111021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2395482650 (or 2395482648 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 111121111021012 its reverse (210120111121111), we get a palindrome (321241222142123).

The spelling of 111121111021012 in words is "one hundred eleven trillion, one hundred twenty-one billion, one hundred eleven million, twenty-one thousand, twelve".