12011001202121 has 4 divisors (see below), whose sum is σ = 12012625854612. Its totient is φ = 12009376549632.

The previous prime is 12011001202097. The next prime is 12011001202159. The reversal of 12011001202121 is 12120210011021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5094337900096 + 6916663302025 = 2257064^2 + 2629955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12011001202121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011001202096 and 12011001202105.

It is not an unprimeable number, because it can be changed into a prime (12011001282121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 812315156 + ... + 812329941.

It is an arithmetic number, because the mean of its divisors is an integer number (3003156463653).

Almost surely, 2^{12011001202121} is an apocalyptic number.

It is an amenable number.

12011001202121 is a deficient number, since it is larger than the sum of its proper divisors (1624652491).

12011001202121 is an equidigital number, since it uses as much as digits as its factorization.

12011001202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1624652490.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12011001202121 its reverse (12120210011021), we get a palindrome (24131211213142).

The spelling of 12011001202121 in words is "twelve trillion, eleven billion, one million, two hundred two thousand, one hundred twenty-one".