12100121 has 8 divisors (see below), whose sum is σ = 13310688. Its totient is φ = 10998900.

The previous prime is 12100111. The next prime is 12100159.

12100121 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12100121 - 2⁶ = 12100057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12100099 and 12100108.

It is not an unprimeable number, because it can be changed into a prime (12100111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3215 + ... + 5876.

It is an arithmetic number, because the mean of its divisors is an integer number (1663836).

Almost surely, 2^12100121 is an apocalyptic number.

12100121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12100121 is a deficient number, since it is larger than the sum of its proper divisors (1210567).

12100121 is an frugal number, since it uses more digits than its factorization.

12100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9124 (or 9102 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 12100121 is about 3478.5228186689. The cubic root of 12100121 is about 229.5778077208.

It can be divided in two parts, 12100 and 121, that multiplied together give a square (1464100 = 1210²).

The spelling of 12100121 in words is "twelve million, one hundred thousand, one hundred twenty-one".