221262418943 has 2 divisors, whose sum is σ = 221262418944. Its totient is φ = 221262418942.

The previous prime is 221262418891. The next prime is 221262418957. The reversal of 221262418943 is 349814262122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221262418943 - 2⁶ = 221262418879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221262418894 and 221262418903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221262418343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110631209471 + 110631209472.

It is an arithmetic number, because the mean of its divisors is an integer number (110631209472).

Almost surely, 2^221262418943 is an apocalyptic number.

221262418943 is a deficient number, since it is larger than the sum of its proper divisors (1).

221262418943 is an equidigital number, since it uses as much as digits as its factorization.

221262418943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 44.

The spelling of 221262418943 in words is "two hundred twenty-one billion, two hundred sixty-two million, four hundred eighteen thousand, nine hundred forty-three".