221123113469 has 2 divisors, whose sum is σ = 221123113470. Its totient is φ = 221123113468.

The previous prime is 221123113447. The next prime is 221123113483. The reversal of 221123113469 is 964311321122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178620343225 + 42502770244 = 422635^2 + 206162^2 .

It is a cyclic number.

It is not a de Polignac number, because 221123113469 - 2²⁸ = 220854678013 is a prime.

It is a super-2 number, since 2×221123113469² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221123113369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110561556734 + 110561556735.

It is an arithmetic number, because the mean of its divisors is an integer number (110561556735).

Almost surely, 2^221123113469 is an apocalyptic number.

It is an amenable number.

221123113469 is a deficient number, since it is larger than the sum of its proper divisors (1).

221123113469 is an equidigital number, since it uses as much as digits as its factorization.

221123113469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The spelling of 221123113469 in words is "two hundred twenty-one billion, one hundred twenty-three million, one hundred thirteen thousand, four hundred sixty-nine".