221201430959 has 2 divisors, whose sum is σ = 221201430960. Its totient is φ = 221201430958.

The previous prime is 221201430883. The next prime is 221201430991. The reversal of 221201430959 is 959034102122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221201430959 - 2¹⁶ = 221201365423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221201439959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600715479 + 110600715480.

It is an arithmetic number, because the mean of its divisors is an integer number (110600715480).

Almost surely, 2^221201430959 is an apocalyptic number.

221201430959 is a deficient number, since it is larger than the sum of its proper divisors (1).

221201430959 is an equidigital number, since it uses as much as digits as its factorization.

221201430959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 221201430959 in words is "two hundred twenty-one billion, two hundred one million, four hundred thirty thousand, nine hundred fifty-nine".