12201021100121 has 16 divisors (see below), whose sum is σ = 14268448364544. Its totient is φ = 10214704828944.

The previous prime is 12201021100117. The next prime is 12201021100123. The reversal of 12201021100121 is 12100112010221.

It is not a de Polignac number, because 12201021100121 - 2² = 12201021100117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12201021100096 and 12201021100105.

It is not an unprimeable number, because it can be changed into a prime (12201021100123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49429616 + ... + 49675838.

It is an arithmetic number, because the mean of its divisors is an integer number (891778022784).

Almost surely, 2^{12201021100121} is an apocalyptic number.

It is an amenable number.

12201021100121 is a deficient number, since it is larger than the sum of its proper divisors (2067427264423).

12201021100121 is a wasteful number, since it uses less digits than its factorization.

12201021100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410900.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12201021100121 its reverse (12100112010221), we get a palindrome (24301133110342).

The spelling of 12201021100121 in words is "twelve trillion, two hundred one billion, twenty-one million, one hundred thousand, one hundred twenty-one".