123235356551 has 2 divisors, whose sum is σ = 123235356552. Its totient is φ = 123235356550.

The previous prime is 123235356547. The next prime is 123235356583. The reversal of 123235356551 is 155653532321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123235356551 - 2² = 123235356547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123235356499 and 123235356508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123235358551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61617678275 + 61617678276.

It is an arithmetic number, because the mean of its divisors is an integer number (61617678276).

Almost surely, 2^123235356551 is an apocalyptic number.

123235356551 is a deficient number, since it is larger than the sum of its proper divisors (1).

123235356551 is an equidigital number, since it uses as much as digits as its factorization.

123235356551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 405000, while the sum is 41.

Adding to 123235356551 its reverse (155653532321), we get a palindrome (278888888872).

The spelling of 123235356551 in words is "one hundred twenty-three billion, two hundred thirty-five million, three hundred fifty-six thousand, five hundred fifty-one".