12002021111 has 4 divisors (see below), whose sum is σ = 12004450224. Its totient is φ = 11999592000.

The previous prime is 12002021107. The next prime is 12002021117. The reversal of 12002021111 is 11112020021.

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 12002021111 - 2² = 12002021107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12002021092 and 12002021101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12002021117) by changing a digit.

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, 1207130 + ... + 1217031.

It is an arithmetic number, because the mean of its divisors is an integer number (3001112556).

Almost surely, 2^12002021111 is an apocalyptic number.

12002021111 is a deficient number, since it is larger than the sum of its proper divisors (2429113).

12002021111 is an equidigital number, since it uses as much as digits as its factorization.

12002021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429112.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12002021111 its reverse (11112020021), we get a palindrome (23114041132).

The spelling of 12002021111 in words is "twelve billion, two million, twenty-one thousand, one hundred eleven".