12111022011 has 48 divisors (see below), whose sum is σ = 18038311200. Its totient is φ = 7221434880.

The previous prime is 12111021983. The next prime is 12111022013. The reversal of 12111022011 is 11022011121.

It is not a de Polignac number, because 12111022011 - 2¹³ = 12111013819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12111022013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7397485 + ... + 7399121.

It is an arithmetic number, because the mean of its divisors is an integer number (375798150).

Almost surely, 2^12111022011 is an apocalyptic number.

12111022011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12111022011 is a deficient number, since it is larger than the sum of its proper divisors (5927289189).

12111022011 is a wasteful number, since it uses less digits than its factorization.

12111022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980 (or 1969 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12111022011 its reverse (11022011121), we get a palindrome (23133033132).

It can be divided in two parts, 121 and 11022011, that multiplied together give a palindrome (1333663331).

The spelling of 12111022011 in words is "twelve billion, one hundred eleven million, twenty-two thousand, eleven".