12020134220121 has 4 divisors (see below), whose sum is σ = 16026845626832. Its totient is φ = 8013422813412.

The previous prime is 12020134220113. The next prime is 12020134220189. The reversal of 12020134220121 is 12102243102021.

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 not a de Polignac number, because 12020134220121 - 2³ = 12020134220113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12020134220191) 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, 2003355703351 + ... + 2003355703356.

It is an arithmetic number, because the mean of its divisors is an integer number (4006711406708).

Almost surely, 2^{12020134220121} is an apocalyptic number.

It is an amenable number.

12020134220121 is a deficient number, since it is larger than the sum of its proper divisors (4006711406711).

12020134220121 is an equidigital number, since it uses as much as digits as its factorization.

12020134220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4006711406710.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 12020134220121 its reverse (12102243102021), we get a palindrome (24122377322142).

The spelling of 12020134220121 in words is "twelve trillion, twenty billion, one hundred thirty-four million, two hundred twenty thousand, one hundred twenty-one".