213011121244121 has 2 divisors, whose sum is σ = 213011121244122. Its totient is φ = 213011121244120.

The previous prime is 213011121244109. The next prime is 213011121244169. The reversal of 213011121244121 is 121442121110312.

213011121244121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210253944018496 + 2757177225625 = 14500136^2 + 1660475^2 .

It is a cyclic number.

It is not a de Polignac number, because 213011121244121 - 2¹⁰ = 213011121243097 is a prime.

It is not a weakly prime, because it can be changed into another prime (213011121244021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106505560622060 + 106505560622061.

It is an arithmetic number, because the mean of its divisors is an integer number (106505560622061).

Almost surely, 2^{213011121244121} is an apocalyptic number.

It is an amenable number.

213011121244121 is a deficient number, since it is larger than the sum of its proper divisors (1).

213011121244121 is an equidigital number, since it uses as much as digits as its factorization.

213011121244121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 26.

Adding to 213011121244121 its reverse (121442121110312), we get a palindrome (334453242354433).

The spelling of 213011121244121 in words is "two hundred thirteen trillion, eleven billion, one hundred twenty-one million, two hundred forty-four thousand, one hundred twenty-one".