12201000121 has 4 divisors (see below), whose sum is σ = 12338090100. Its totient is φ = 12063910144.

The previous prime is 12201000107. The next prime is 12201000131. The reversal of 12201000121 is 12100010221.

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 7984316025 + 4216684096 = 89355^2 + 64936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12201000121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12201000098 and 12201000107.

It is not an unprimeable number, because it can be changed into a prime (12201000131) 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, 68544856 + ... + 68545033.

It is an arithmetic number, because the mean of its divisors is an integer number (3084522525).

Almost surely, 2^12201000121 is an apocalyptic number.

It is an amenable number.

12201000121 is a deficient number, since it is larger than the sum of its proper divisors (137089979).

12201000121 is an equidigital number, since it uses as much as digits as its factorization.

12201000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137089978.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12201000121 its reverse (12100010221), we get a palindrome (24301010342).

The spelling of 12201000121 in words is "twelve billion, two hundred one million, one hundred twenty-one", and thus it is an aban number.