12101010121 has 4 divisors (see below), whose sum is σ = 12101844352. Its totient is φ = 12100175892.

The previous prime is 12101010109. The next prime is 12101010127.

12101010121 is nontrivially palindromic in base 10.

12101010121 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

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 a de Polignac number, because none of the positive numbers 2^k-12101010121 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101010098 and 12101010107.

It is not an unprimeable number, because it can be changed into a prime (12101010127) 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, 394965 + ... + 424498.

It is an arithmetic number, because the mean of its divisors is an integer number (3025461088).

Almost surely, 2^12101010121 is an apocalyptic number.

It is an amenable number.

12101010121 is a deficient number, since it is larger than the sum of its proper divisors (834231).

12101010121 is an equidigital number, since it uses as much as digits as its factorization.

12101010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834230.

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

It can be divided in two parts, 121010 and 10121, that added together give a palindrome (131131).

The spelling of 12101010121 in words is "twelve billion, one hundred one million, ten thousand, one hundred twenty-one".