12020010111 has 6 divisors (see below), whose sum is σ = 17362236840. Its totient is φ = 8013340068.

The previous prime is 12020010053. The next prime is 12020010113. The reversal of 12020010111 is 11101002021.

It is a happy number.

It is not a de Polignac number, because 12020010111 - 2¹⁰ = 12020009087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1335556679 = 12020010111 / (1 + 2 + 0 + 2 + 0 + 0 + 1 + 0 + 1 + 1 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 12020010093 and 12020010102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020010113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 667778331 + ... + 667778348.

It is an arithmetic number, because the mean of its divisors is an integer number (2893706140).

Almost surely, 2^12020010111 is an apocalyptic number.

12020010111 is a deficient number, since it is larger than the sum of its proper divisors (5342226729).

12020010111 is a wasteful number, since it uses less digits than its factorization.

12020010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335556685 (or 1335556682 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 12020010111 its reverse (11101002021), we get a palindrome (23121012132).

The spelling of 12020010111 in words is "twelve billion, twenty million, ten thousand, one hundred eleven".