221121068243 has 2 divisors, whose sum is σ = 221121068244. Its totient is φ = 221121068242.

The previous prime is 221121068191. The next prime is 221121068257. The reversal of 221121068243 is 342860121122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221121068243 - 2²⁴ = 221104291027 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (221121068263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560534121 + 110560534122.

It is an arithmetic number, because the mean of its divisors is an integer number (110560534122).

Almost surely, 2^221121068243 is an apocalyptic number.

221121068243 is a deficient number, since it is larger than the sum of its proper divisors (1).

221121068243 is an equidigital number, since it uses as much as digits as its factorization.

221121068243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

Adding to 221121068243 its reverse (342860121122), we get a palindrome (563981189365).

The spelling of 221121068243 in words is "two hundred twenty-one billion, one hundred twenty-one million, sixty-eight thousand, two hundred forty-three".