221501321440019 has 2 divisors, whose sum is σ = 221501321440020. Its totient is φ = 221501321440018.

The previous prime is 221501321439949. The next prime is 221501321440067. The reversal of 221501321440019 is 910044123105122.

221501321440019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221501321440019 - 2¹⁶ = 221501321374483 is a prime.

It is a super-2 number, since 2×221501321440019² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221501321440519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110750660720009 + 110750660720010.

It is an arithmetic number, because the mean of its divisors is an integer number (110750660720010).

Almost surely, 2^{221501321440019} is an apocalyptic number.

221501321440019 is a deficient number, since it is larger than the sum of its proper divisors (1).

221501321440019 is an equidigital number, since it uses as much as digits as its factorization.

221501321440019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 221501321440019 in words is "two hundred twenty-one trillion, five hundred one billion, three hundred twenty-one million, four hundred forty thousand, nineteen".