213552514121 has 2 divisors, whose sum is σ = 213552514122. Its totient is φ = 213552514120.

The previous prime is 213552514069. The next prime is 213552514141. The reversal of 213552514121 is 121415255312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132405015625 + 81147498496 = 363875^2 + 284864^2 .

It is a cyclic number.

It is not a de Polignac number, because 213552514121 - 2²⁶ = 213485405257 is a prime.

It is not a weakly prime, because it can be changed into another prime (213552514141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106776257060 + 106776257061.

It is an arithmetic number, because the mean of its divisors is an integer number (106776257061).

Almost surely, 2^213552514121 is an apocalyptic number.

It is an amenable number.

213552514121 is a deficient number, since it is larger than the sum of its proper divisors (1).

213552514121 is an equidigital number, since it uses as much as digits as its factorization.

213552514121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12000, while the sum is 32.

Adding to 213552514121 its reverse (121415255312), we get a palindrome (334967769433).

The spelling of 213552514121 in words is "two hundred thirteen billion, five hundred fifty-two million, five hundred fourteen thousand, one hundred twenty-one".