221130043 has 2 divisors, whose sum is σ = 221130044. Its totient is φ = 221130042.

The previous prime is 221130031. The next prime is 221130047. The reversal of 221130043 is 340031122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221130043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221129999 and 221130026.

It is not a weakly prime, because it can be changed into another prime (221130047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110565021 + 110565022.

It is an arithmetic number, because the mean of its divisors is an integer number (110565022).

Almost surely, 2^221130043 is an apocalyptic number.

221130043 is a deficient number, since it is larger than the sum of its proper divisors (1).

221130043 is an equidigital number, since it uses as much as digits as its factorization.

221130043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 221130043 is about 14870.4419234937. The cubic root of 221130043 is about 604.7129234744.

Adding to 221130043 its reverse (340031122), we get a palindrome (561161165).

The spelling of 221130043 in words is "two hundred twenty-one million, one hundred thirty thousand, forty-three".