213422303021 has 2 divisors, whose sum is σ = 213422303022. Its totient is φ = 213422303020.

The previous prime is 213422302993. The next prime is 213422303027. The reversal of 213422303021 is 120303224312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211774836100 + 1647466921 = 460190^2 + 40589^2 .

It is a cyclic number.

It is not a de Polignac number, because 213422303021 - 2¹⁸ = 213422040877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213422303027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106711151510 + 106711151511.

It is an arithmetic number, because the mean of its divisors is an integer number (106711151511).

Almost surely, 2^213422303021 is an apocalyptic number.

It is an amenable number.

213422303021 is a deficient number, since it is larger than the sum of its proper divisors (1).

213422303021 is an equidigital number, since it uses as much as digits as its factorization.

213422303021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 213422303021 its reverse (120303224312), we get a palindrome (333725527333).

The spelling of 213422303021 in words is "two hundred thirteen billion, four hundred twenty-two million, three hundred three thousand, twenty-one".