213321722723 has 2 divisors, whose sum is σ = 213321722724. Its totient is φ = 213321722722.

The previous prime is 213321722701. The next prime is 213321722749. The reversal of 213321722723 is 327227123312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213321722723 - 2¹⁶ = 213321657187 is a prime.

It is not a weakly prime, because it can be changed into another prime (213321722123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106660861361 + 106660861362.

It is an arithmetic number, because the mean of its divisors is an integer number (106660861362).

Almost surely, 2^213321722723 is an apocalyptic number.

213321722723 is a deficient number, since it is larger than the sum of its proper divisors (1).

213321722723 is an equidigital number, since it uses as much as digits as its factorization.

213321722723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 35.

The spelling of 213321722723 in words is "two hundred thirteen billion, three hundred twenty-one million, seven hundred twenty-two thousand, seven hundred twenty-three".