12320020121 has 8 divisors (see below), whose sum is σ = 12378772224. Its totient is φ = 12261299760.

The previous prime is 12320020061. The next prime is 12320020133. The reversal of 12320020121 is 12102002321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12320020121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12320020096 and 12320020105.

It is not an unprimeable number, because it can be changed into a prime (12320020021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1194830 + ... + 1205096.

It is an arithmetic number, because the mean of its divisors is an integer number (1547346528).

Almost surely, 2^12320020121 is an apocalyptic number.

It is an amenable number.

12320020121 is a deficient number, since it is larger than the sum of its proper divisors (58752103).

12320020121 is a wasteful number, since it uses less digits than its factorization.

12320020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15871.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12320020121 its reverse (12102002321), we get a palindrome (24422022442).

The spelling of 12320020121 in words is "twelve billion, three hundred twenty million, twenty thousand, one hundred twenty-one".