12021111107 has 4 divisors (see below), whose sum is σ = 12131396640. Its totient is φ = 11910825576.

The previous prime is 12021111073. The next prime is 12021111133. The reversal of 12021111107 is 70111112021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12021111107 - 2¹² = 12021107011 is a prime.

It is a super-2 number, since 2×12021111107² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021113107) 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, 55142603 + ... + 55142820.

It is an arithmetic number, because the mean of its divisors is an integer number (3032849160).

Almost surely, 2^12021111107 is an apocalyptic number.

12021111107 is a deficient number, since it is larger than the sum of its proper divisors (110285533).

12021111107 is a wasteful number, since it uses less digits than its factorization.

12021111107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110285532.

The product of its (nonzero) digits is 28, while the sum is 17.

Adding to 12021111107 its reverse (70111112021), we get a palindrome (82132223128).

The spelling of 12021111107 in words is "twelve billion, twenty-one million, one hundred eleven thousand, one hundred seven".