12111001002121 has 4 divisors (see below), whose sum is σ = 13841144002432. Its totient is φ = 10380858001812.

The previous prime is 12111001002109. The next prime is 12111001002127. The reversal of 12111001002121 is 12120010011121.

It is a happy number.

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 12111001002121 - 2⁷ = 12111001001993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111001002127) 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, 865071500145 + ... + 865071500158.

It is an arithmetic number, because the mean of its divisors is an integer number (3460286000608).

Almost surely, 2^{12111001002121} is an apocalyptic number.

It is an amenable number.

12111001002121 is a deficient number, since it is larger than the sum of its proper divisors (1730143000311).

12111001002121 is an equidigital number, since it uses as much as digits as its factorization.

12111001002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1730143000310.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12111001002121 its reverse (12120010011121), we get a palindrome (24231011013242).

The spelling of 12111001002121 in words is "twelve trillion, one hundred eleven billion, one million, two thousand, one hundred twenty-one".