12102020121121 has 4 divisors (see below), whose sum is σ = 13830880138432. Its totient is φ = 10373160103812.

The previous prime is 12102020121049. The next prime is 12102020121179. The reversal of 12102020121121 is 12112102020121.

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 12102020121121 - 2²⁹ = 12101483250209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12102020121095 and 12102020121104.

It is not an unprimeable number, because it can be changed into a prime (12102020121421) 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, 864430008645 + ... + 864430008658.

It is an arithmetic number, because the mean of its divisors is an integer number (3457720034608).

Almost surely, 2^{12102020121121} is an apocalyptic number.

It is an amenable number.

12102020121121 is a deficient number, since it is larger than the sum of its proper divisors (1728860017311).

12102020121121 is an equidigital number, since it uses as much as digits as its factorization.

12102020121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728860017310.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12102020121121 its reverse (12112102020121), we get a palindrome (24214122141242).

It can be divided in two parts, 12102020121 and 121, that multiplied together give a palindrome (1464344434641).

The spelling of 12102020121121 in words is "twelve trillion, one hundred two billion, twenty million, one hundred twenty-one thousand, one hundred twenty-one".