213230220121 has 2 divisors, whose sum is σ = 213230220122. Its totient is φ = 213230220120.

The previous prime is 213230220101. The next prime is 213230220131. The reversal of 213230220121 is 121022032312.

213230220121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212184603225 + 1045616896 = 460635^2 + 32336^2 .

It is a cyclic number.

It is not a de Polignac number, because 213230220121 - 2²¹ = 213228122969 is a prime.

It is a super-2 number, since 2×213230220121² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213230220101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106615110060 + 106615110061.

It is an arithmetic number, because the mean of its divisors is an integer number (106615110061).

Almost surely, 2^213230220121 is an apocalyptic number.

It is an amenable number.

213230220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

213230220121 is an equidigital number, since it uses as much as digits as its factorization.

213230220121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 213230220121 its reverse (121022032312), we get a palindrome (334252252433).

The spelling of 213230220121 in words is "two hundred thirteen billion, two hundred thirty million, two hundred twenty thousand, one hundred twenty-one".