12102010121 has 4 divisors (see below), whose sum is σ = 12103554372. Its totient is φ = 12100465872.

The previous prime is 12102010087. The next prime is 12102010147. The reversal of 12102010121 is 12101020121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5700250000 + 6401760121 = 75500^2 + 80011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12102010121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12102012121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 760310 + ... + 776063.

It is an arithmetic number, because the mean of its divisors is an integer number (3025888593).

Almost surely, 2^12102010121 is an apocalyptic number.

It is an amenable number.

12102010121 is a deficient number, since it is larger than the sum of its proper divisors (1544251).

12102010121 is an equidigital number, since it uses as much as digits as its factorization.

12102010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544250.

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

Adding to 12102010121 its reverse (12101020121), we get a palindrome (24203030242).

The spelling of 12102010121 in words is "twelve billion, one hundred two million, ten thousand, one hundred twenty-one".