12211112122121 has 12 divisors (see below), whose sum is σ = 13426338176832. Its totient is φ = 11097531819000.

The previous prime is 12211112122093. The next prime is 12211112122133. The reversal of 12211112122121 is 12122121111221.

It is a happy number.

It is not a de Polignac number, because 12211112122121 - 2¹⁰ = 12211112121097 is a prime.

It is a super-2 number, since 2×12211112122121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12211112122093 and 12211112122102.

It is not an unprimeable number, because it can be changed into a prime (12211112124121) 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, 15426845 + ... + 16199066.

It is an arithmetic number, because the mean of its divisors is an integer number (1118861514736).

Almost surely, 2^{12211112122121} is an apocalyptic number.

12211112122121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12211112122121 is a deficient number, since it is larger than the sum of its proper divisors (1215226054711).

12211112122121 is a wasteful number, since it uses less digits than its factorization.

12211112122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31629124 (or 31629113 counting only the distinct ones).

The product of its digits is 64, while the sum is 20.

Adding to 12211112122121 its reverse (12122121111221), we get a palindrome (24333233233342).

The spelling of 12211112122121 in words is "twelve trillion, two hundred eleven billion, one hundred twelve million, one hundred twenty-two thousand, one hundred twenty-one".