221434013387 has 2 divisors, whose sum is σ = 221434013388. Its totient is φ = 221434013386.

The previous prime is 221434013369. The next prime is 221434013441. The reversal of 221434013387 is 783310434122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221434013387 - 2⁶ = 221434013323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221434013387.

It is not a weakly prime, because it can be changed into another prime (221434013347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110717006693 + 110717006694.

It is an arithmetic number, because the mean of its divisors is an integer number (110717006694).

Almost surely, 2^221434013387 is an apocalyptic number.

221434013387 is a deficient number, since it is larger than the sum of its proper divisors (1).

221434013387 is an equidigital number, since it uses as much as digits as its factorization.

221434013387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 38.

The spelling of 221434013387 in words is "two hundred twenty-one billion, four hundred thirty-four million, thirteen thousand, three hundred eighty-seven".