221442386747 has 2 divisors, whose sum is σ = 221442386748. Its totient is φ = 221442386746.

The previous prime is 221442386731. The next prime is 221442386749. The reversal of 221442386747 is 747683244122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221442386747 - 2⁴ = 221442386731 is a prime.

Together with 221442386749, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 221442386695 and 221442386704.

It is not a weakly prime, because it can be changed into another prime (221442386749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110721193373 + 110721193374.

It is an arithmetic number, because the mean of its divisors is an integer number (110721193374).

Almost surely, 2^221442386747 is an apocalyptic number.

221442386747 is a deficient number, since it is larger than the sum of its proper divisors (1).

221442386747 is an equidigital number, since it uses as much as digits as its factorization.

221442386747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3612672, while the sum is 50.

The spelling of 221442386747 in words is "two hundred twenty-one billion, four hundred forty-two million, three hundred eighty-six thousand, seven hundred forty-seven".