221431464501019 has 2 divisors, whose sum is σ = 221431464501020. Its totient is φ = 221431464501018.

The previous prime is 221431464501017. The next prime is 221431464501097. The reversal of 221431464501019 is 910105464134122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221431464501019 - 2¹ = 221431464501017 is a prime.

It is a super-2 number, since 2×221431464501019² (a number of 29 digits) contains 22 as substring.

Together with 221431464501017, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (221431464501017) 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, 110715732250509 + 110715732250510.

It is an arithmetic number, because the mean of its divisors is an integer number (110715732250510).

Almost surely, 2^{221431464501019} is an apocalyptic number.

221431464501019 is a deficient number, since it is larger than the sum of its proper divisors (1).

221431464501019 is an equidigital number, since it uses as much as digits as its factorization.

221431464501019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 221431464501019 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, four hundred sixty-four million, five hundred one thousand, nineteen".