12100100121 has 24 divisors (see below), whose sum is σ = 17958283200. Its totient is φ = 7845222816.

The previous prime is 12100100101. The next prime is 12100100147.

It is a happy number.

12100100121 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12100100121 - 2¹⁹ = 12099575833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (12100100101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 892036 + ... + 905498.

It is an arithmetic number, because the mean of its divisors is an integer number (748261800).

Almost surely, 2^12100100121 is an apocalyptic number.

It is an amenable number.

12100100121 is a deficient number, since it is larger than the sum of its proper divisors (5858183079).

12100100121 is a wasteful number, since it uses less digits than its factorization.

12100100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16205 (or 16202 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The spelling of 12100100121 in words is "twelve billion, one hundred million, one hundred thousand, one hundred twenty-one".