221556223043 has 2 divisors, whose sum is σ = 221556223044. Its totient is φ = 221556223042.

The previous prime is 221556223013. The next prime is 221556223061. The reversal of 221556223043 is 340322655122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221556223043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221556222994 and 221556223012.

It is not a weakly prime, because it can be changed into another prime (221556223013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110778111521 + 110778111522.

It is an arithmetic number, because the mean of its divisors is an integer number (110778111522).

Almost surely, 2^221556223043 is an apocalyptic number.

221556223043 is a deficient number, since it is larger than the sum of its proper divisors (1).

221556223043 is an equidigital number, since it uses as much as digits as its factorization.

221556223043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 221556223043 its reverse (340322655122), we get a palindrome (561878878165).

The spelling of 221556223043 in words is "two hundred twenty-one billion, five hundred fifty-six million, two hundred twenty-three thousand, forty-three".