12021301230121 has 4 divisors (see below), whose sum is σ = 12023265180244. Its totient is φ = 12019337280000.

The previous prime is 12021301230101. The next prime is 12021301230137. The reversal of 12021301230121 is 12103210312021.

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 2927674992025 + 9093626238096 = 1711045^2 + 3015564^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021301230121 - 2²³ = 12021292841513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021301230101) 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, 981965880 + ... + 981978121.

It is an arithmetic number, because the mean of its divisors is an integer number (3005816295061).

Almost surely, 2^{12021301230121} is an apocalyptic number.

It is an amenable number.

12021301230121 is a deficient number, since it is larger than the sum of its proper divisors (1963950123).

12021301230121 is an equidigital number, since it uses as much as digits as its factorization.

12021301230121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1963950122.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 12021301230121 its reverse (12103210312021), we get a palindrome (24124511542142).

The spelling of 12021301230121 in words is "twelve trillion, twenty-one billion, three hundred one million, two hundred thirty thousand, one hundred twenty-one".