12201200121 has 32 divisors (see below), whose sum is σ = 17845266816. Its totient is φ = 7353920000.

The previous prime is 12201200111. The next prime is 12201200147. The reversal of 12201200121 is 12100210221.

It is a cyclic number.

It is not a de Polignac number, because 12201200121 - 2¹⁰ = 12201199097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12201200097 and 12201200106.

It is not an unprimeable number, because it can be changed into a prime (12201200111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6499435 + ... + 6501311.

It is an arithmetic number, because the mean of its divisors is an integer number (557664588).

Almost surely, 2^12201200121 is an apocalyptic number.

12201200121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12201200121 is a deficient number, since it is larger than the sum of its proper divisors (5644066695).

12201200121 is a wasteful number, since it uses less digits than its factorization.

12201200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2873.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12201200121 its reverse (12100210221), we get a palindrome (24301410342).

The spelling of 12201200121 in words is "twelve billion, two hundred one million, two hundred thousand, one hundred twenty-one".