12121222120201 has 4 divisors (see below), whose sum is σ = 12379120463232. Its totient is φ = 11863323777172.

The previous prime is 12121222120193. The next prime is 12121222120213. The reversal of 12121222120201 is 10202122212121.

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 12121222120201 - 2³ = 12121222120193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121222120001) 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, 128949171445 + ... + 128949171538.

It is an arithmetic number, because the mean of its divisors is an integer number (3094780115808).

Almost surely, 2^{12121222120201} is an apocalyptic number.

It is an amenable number.

12121222120201 is a deficient number, since it is larger than the sum of its proper divisors (257898343031).

12121222120201 is an equidigital number, since it uses as much as digits as its factorization.

12121222120201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257898343030.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12121222120201 its reverse (10202122212121), we get a palindrome (22323344332322).

The spelling of 12121222120201 in words is "twelve trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred twenty thousand, two hundred one".