12021201111 has 8 divisors (see below), whose sum is σ = 16545309184. Its totient is φ = 7755613560.

The previous prime is 12021201097. The next prime is 12021201151. The reversal of 12021201111 is 11110212021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12021201111 - 2¹⁵ = 12021168343 is a prime.

It is a super-2 number, since 2×12021201111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021201151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64630021 + ... + 64630206.

It is an arithmetic number, because the mean of its divisors is an integer number (2068163648).

Almost surely, 2^12021201111 is an apocalyptic number.

12021201111 is a deficient number, since it is larger than the sum of its proper divisors (4524108073).

12021201111 is a wasteful number, since it uses less digits than its factorization.

12021201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129260261.

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

Adding to 12021201111 its reverse (11110212021), we get a palindrome (23131413132).

The spelling of 12021201111 in words is "twelve billion, twenty-one million, two hundred one thousand, one hundred eleven".