12001210111121 has 12 divisors (see below), whose sum is σ = 15229736022960. Its totient is φ = 9351592293960.

The previous prime is 12001210111109. The next prime is 12001210111127. The reversal of 12001210111121 is 12111101210021.

It is a de Polignac number, because none of the positive numbers 2^k-12001210111121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12001210111096 and 12001210111105.

It is not an unprimeable number, because it can be changed into a prime (12001210111127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11132847431 + ... + 11132848508.

It is an arithmetic number, because the mean of its divisors is an integer number (1269144668580).

Almost surely, 2^{12001210111121} is an apocalyptic number.

12001210111121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12001210111121 is a deficient number, since it is larger than the sum of its proper divisors (3228525911839).

12001210111121 is a wasteful number, since it uses less digits than its factorization.

12001210111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22265695964 (or 22265695957 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 12001210111121 its reverse (12111101210021), we get a palindrome (24112311321142).

The spelling of 12001210111121 in words is "twelve trillion, one billion, two hundred ten million, one hundred eleven thousand, one hundred twenty-one".