221234352304387 has 2 divisors, whose sum is σ = 221234352304388. Its totient is φ = 221234352304386.

The previous prime is 221234352304309. The next prime is 221234352304409. The reversal of 221234352304387 is 783403253432122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221234352304387 - 2¹¹ = 221234352302339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221234352304387.

It is not a weakly prime, because it can be changed into another prime (221234352304307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110617176152193 + 110617176152194.

It is an arithmetic number, because the mean of its divisors is an integer number (110617176152194).

Almost surely, 2^{221234352304387} is an apocalyptic number.

221234352304387 is a deficient number, since it is larger than the sum of its proper divisors (1).

221234352304387 is an equidigital number, since it uses as much as digits as its factorization.

221234352304387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5806080, while the sum is 49.

The spelling of 221234352304387 in words is "two hundred twenty-one trillion, two hundred thirty-four billion, three hundred fifty-two million, three hundred four thousand, three hundred eighty-seven".