12010121111 has 8 divisors (see below), whose sum is σ = 12262241040. Its totient is φ = 11760368832.

The previous prime is 12010121107. The next prime is 12010121147. The reversal of 12010121111 is 11112101021.

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

It is a cyclic number.

It is not a de Polignac number, because 12010121111 - 2² = 12010121107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12010121092 and 12010121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12010121911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581660 + ... + 601953.

It is an arithmetic number, because the mean of its divisors is an integer number (1532780130).

Almost surely, 2^12010121111 is an apocalyptic number.

12010121111 is a deficient number, since it is larger than the sum of its proper divisors (252119929).

12010121111 is a wasteful number, since it uses less digits than its factorization.

12010121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183825.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 12010121111 its reverse (11112101021), we get a palindrome (23122222132).

The spelling of 12010121111 in words is "twelve billion, ten million, one hundred twenty-one thousand, one hundred eleven".