12112100121 has 48 divisors (see below), whose sum is σ = 18206648768. Its totient is φ = 7153090560.

The previous prime is 12112100093. The next prime is 12112100141. The reversal of 12112100121 is 12100121121.

It is not a de Polignac number, because 12112100121 - 2⁶ = 12112100057 is a prime.

It is a super-2 number, since 2×12112100121² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12112100097 and 12112100106.

It is not an unprimeable number, because it can be changed into a prime (12112100141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10504281 + ... + 10505433.

Almost surely, 2^12112100121 is an apocalyptic number.

12112100121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12112100121 is a deficient number, since it is larger than the sum of its proper divisors (6094548647).

12112100121 is a wasteful number, since it uses less digits than its factorization.

12112100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1894 (or 1883 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12112100121 its reverse (12100121121), we get a palindrome (24212221242).

It can be divided in two parts, 121 and 12100121, that multiplied together give a palindrome (1464114641).

The spelling of 12112100121 in words is "twelve billion, one hundred twelve million, one hundred thousand, one hundred twenty-one".