123310553111 has 2 divisors, whose sum is σ = 123310553112. Its totient is φ = 123310553110.

The previous prime is 123310553057. The next prime is 123310553141. The reversal of 123310553111 is 111355013321.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (111355013321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123310553111 - 2¹⁸ = 123310290967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123310553141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61655276555 + 61655276556.

It is an arithmetic number, because the mean of its divisors is an integer number (61655276556).

Almost surely, 2^123310553111 is an apocalyptic number.

123310553111 is a deficient number, since it is larger than the sum of its proper divisors (1).

123310553111 is an equidigital number, since it uses as much as digits as its factorization.

123310553111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1350, while the sum is 26.

Adding to 123310553111 its reverse (111355013321), we get a palindrome (234665566432).

The spelling of 123310553111 in words is "one hundred twenty-three billion, three hundred ten million, five hundred fifty-three thousand, one hundred eleven".