12011021200121 has 2 divisors, whose sum is σ = 12011021200122. Its totient is φ = 12011021200120.

The previous prime is 12011021200111. The next prime is 12011021200141. The reversal of 12011021200121 is 12100212011021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10094981107600 + 1916040092521 = 3177260^2 + 1384211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12011021200121 is a prime.

It is a super-2 number, since 2×12011021200121² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12011021200096 and 12011021200105.

It is not a weakly prime, because it can be changed into another prime (12011021200111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005510600060 + 6005510600061.

It is an arithmetic number, because the mean of its divisors is an integer number (6005510600061).

Almost surely, 2^{12011021200121} is an apocalyptic number.

It is an amenable number.

12011021200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011021200121 is an equidigital number, since it uses as much as digits as its factorization.

12011021200121 is an evil number, because the sum of its binary digits is even.

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

Adding to 12011021200121 its reverse (12100212011021), we get a palindrome (24111233211142).

The spelling of 12011021200121 in words is "twelve trillion, eleven billion, twenty-one million, two hundred thousand, one hundred twenty-one".