221130430387 has 2 divisors, whose sum is σ = 221130430388. Its totient is φ = 221130430386.

The previous prime is 221130430379. The next prime is 221130430457. The reversal of 221130430387 is 783034031122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221130430387 - 2³ = 221130430379 is a prime.

It is not a weakly prime, because it can be changed into another prime (221130440387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110565215193 + 110565215194.

It is an arithmetic number, because the mean of its divisors is an integer number (110565215194).

Almost surely, 2^221130430387 is an apocalyptic number.

221130430387 is a deficient number, since it is larger than the sum of its proper divisors (1).

221130430387 is an equidigital number, since it uses as much as digits as its factorization.

221130430387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 34.

The spelling of 221130430387 in words is "two hundred twenty-one billion, one hundred thirty million, four hundred thirty thousand, three hundred eighty-seven".