12011212020121 has 16 divisors (see below), whose sum is σ = 12089646835200. Its totient is φ = 11933041254400.

The previous prime is 12011212020109. The next prime is 12011212020131. The reversal of 12011212020121 is 12102021211021.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12011212020121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011212020095 and 12011212020104.

It is not an unprimeable number, because it can be changed into a prime (12011212020131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202039761 + ... + 202099201.

It is an arithmetic number, because the mean of its divisors is an integer number (755602927200).

Almost surely, 2^{12011212020121} is an apocalyptic number.

It is an amenable number.

12011212020121 is a deficient number, since it is larger than the sum of its proper divisors (78434815079).

12011212020121 is a wasteful number, since it uses less digits than its factorization.

12011212020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61640.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12011212020121 its reverse (12102021211021), we get a palindrome (24113233231142).

The spelling of 12011212020121 in words is "twelve trillion, eleven billion, two hundred twelve million, twenty thousand, one hundred twenty-one".