213301210121 has 2 divisors, whose sum is σ = 213301210122. Its totient is φ = 213301210120.

The previous prime is 213301210097. The next prime is 213301210141. The reversal of 213301210121 is 121012103312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114101408521 + 99199801600 = 337789^2 + 314960^2 .

It is a cyclic number.

It is not a de Polignac number, because 213301210121 - 2¹⁰ = 213301209097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213301210121.

It is not a weakly prime, because it can be changed into another prime (213301210141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106650605060 + 106650605061.

It is an arithmetic number, because the mean of its divisors is an integer number (106650605061).

Almost surely, 2^213301210121 is an apocalyptic number.

It is an amenable number.

213301210121 is a deficient number, since it is larger than the sum of its proper divisors (1).

213301210121 is an equidigital number, since it uses as much as digits as its factorization.

213301210121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 213301210121 its reverse (121012103312), we get a palindrome (334313313433).

The spelling of 213301210121 in words is "two hundred thirteen billion, three hundred one million, two hundred ten thousand, one hundred twenty-one".