221420434043 has 2 divisors, whose sum is σ = 221420434044. Its totient is φ = 221420434042.

The previous prime is 221420434019. The next prime is 221420434117. The reversal of 221420434043 is 340434024122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221420434043 - 2⁶ = 221420433979 is a prime.

It is a super-2 number, since 2×221420434043² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221420433997 and 221420434015.

It is not a weakly prime, because it can be changed into another prime (221420434343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110710217021 + 110710217022.

It is an arithmetic number, because the mean of its divisors is an integer number (110710217022).

Almost surely, 2^221420434043 is an apocalyptic number.

221420434043 is a deficient number, since it is larger than the sum of its proper divisors (1).

221420434043 is an equidigital number, since it uses as much as digits as its factorization.

221420434043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 221420434043 its reverse (340434024122), we get a palindrome (561854458165).

The spelling of 221420434043 in words is "two hundred twenty-one billion, four hundred twenty million, four hundred thirty-four thousand, forty-three".