12111011012 has 12 divisors (see below), whose sum is σ = 21316780716. Its totient is φ = 6020502240.

The previous prime is 12111010999. The next prime is 12111011041. The reversal of 12111011012 is 21011011121.

It can be written as a sum of positive squares in 2 ways, for example, as 4731513796 + 7379497216 = 68786^2 + 85904^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12111010984 and 12111011002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8750039 + ... + 8751422.

It is an arithmetic number, because the mean of its divisors is an integer number (1776398393).

Almost surely, 2^12111011012 is an apocalyptic number.

It is an amenable number.

12111011012 is a deficient number, since it is larger than the sum of its proper divisors (9205769704).

12111011012 is a wasteful number, since it uses less digits than its factorization.

12111011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17501638 (or 17501636 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 12111011012 its reverse (21011011121), we get a palindrome (33122022133).

The spelling of 12111011012 in words is "twelve billion, one hundred eleven million, eleven thousand, twelve".