213243020401 has 2 divisors, whose sum is σ = 213243020402. Its totient is φ = 213243020400.

The previous prime is 213243020369. The next prime is 213243020447. The reversal of 213243020401 is 104020342312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167976202801 + 45266817600 = 409849^2 + 212760^2 .

It is a cyclic number.

It is not a de Polignac number, because 213243020401 - 2⁵ = 213243020369 is a prime.

It is not a weakly prime, because it can be changed into another prime (213243021401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106621510200 + 106621510201.

It is an arithmetic number, because the mean of its divisors is an integer number (106621510201).

Almost surely, 2^213243020401 is an apocalyptic number.

It is an amenable number.

213243020401 is a deficient number, since it is larger than the sum of its proper divisors (1).

213243020401 is an equidigital number, since it uses as much as digits as its factorization.

213243020401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 213243020401 its reverse (104020342312), we get a palindrome (317263362713).

The spelling of 213243020401 in words is "two hundred thirteen billion, two hundred forty-three million, twenty thousand, four hundred one".