123221230511 has 2 divisors, whose sum is σ = 123221230512. Its totient is φ = 123221230510.

The previous prime is 123221230501. The next prime is 123221230513. The reversal of 123221230511 is 115032122321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123221230511 is a prime.

It is a super-2 number, since 2×123221230511² (a number of 23 digits) contains 22 as substring.

Together with 123221230513, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123221230513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61610615255 + 61610615256.

It is an arithmetic number, because the mean of its divisors is an integer number (61610615256).

Almost surely, 2^123221230511 is an apocalyptic number.

123221230511 is a deficient number, since it is larger than the sum of its proper divisors (1).

123221230511 is an equidigital number, since it uses as much as digits as its factorization.

123221230511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 123221230511 its reverse (115032122321), we get a palindrome (238253352832).

The spelling of 123221230511 in words is "one hundred twenty-three billion, two hundred twenty-one million, two hundred thirty thousand, five hundred eleven".