213232032821 has 2 divisors, whose sum is σ = 213232032822. Its totient is φ = 213232032820.

The previous prime is 213232032803. The next prime is 213232032841. The reversal of 213232032821 is 128230232312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167371810321 + 45860222500 = 409111^2 + 214150^2 .

It is a cyclic number.

It is not a de Polignac number, because 213232032821 - 2¹⁸ = 213231770677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213232032841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106616016410 + 106616016411.

It is an arithmetic number, because the mean of its divisors is an integer number (106616016411).

Almost surely, 2^213232032821 is an apocalyptic number.

It is an amenable number.

213232032821 is a deficient number, since it is larger than the sum of its proper divisors (1).

213232032821 is an equidigital number, since it uses as much as digits as its factorization.

213232032821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 213232032821 in words is "two hundred thirteen billion, two hundred thirty-two million, thirty-two thousand, eight hundred twenty-one".