12011212120121 has 8 divisors (see below), whose sum is σ = 12102668550624. Its totient is φ = 11920093791840.

The previous prime is 12011212120109. The next prime is 12011212120211. The reversal of 12011212120121 is 12102121211021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12011212120121 - 2¹⁰ = 12011212119097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12011212120121.

It is not an unprimeable number, because it can be changed into a prime (12011212128121) 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, 84454235 + ... + 84596336.

It is an arithmetic number, because the mean of its divisors is an integer number (1512833568828).

Almost surely, 2^{12011212120121} is an apocalyptic number.

It is an amenable number.

12011212120121 is a deficient number, since it is larger than the sum of its proper divisors (91456430503).

12011212120121 is a wasteful number, since it uses less digits than its factorization.

12011212120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169051111.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12011212120121 its reverse (12102121211021), we get a palindrome (24113333331142).

The spelling of 12011212120121 in words is "twelve trillion, eleven billion, two hundred twelve million, one hundred twenty thousand, one hundred twenty-one".