12111000021001 has 4 divisors (see below), whose sum is σ = 13841142881152. Its totient is φ = 10380857160852.

The previous prime is 12111000020989. The next prime is 12111000021007. The reversal of 12111000021001 is 10012000011121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12111000021001 - 2²⁹ = 12110463150089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111000021007) 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, 865071430065 + ... + 865071430078.

It is an arithmetic number, because the mean of its divisors is an integer number (3460285720288).

Almost surely, 2^{12111000021001} is an apocalyptic number.

It is an amenable number.

12111000021001 is a deficient number, since it is larger than the sum of its proper divisors (1730142860151).

12111000021001 is an equidigital number, since it uses as much as digits as its factorization.

12111000021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1730142860150.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12111000021001 its reverse (10012000011121), we get a palindrome (22123000032122).

The spelling of 12111000021001 in words is "twelve trillion, one hundred eleven billion, twenty-one thousand, one".