123330311261 has 2 divisors, whose sum is σ = 123330311262. Its totient is φ = 123330311260.

The previous prime is 123330311231. The next prime is 123330311267. The reversal of 123330311261 is 162113033321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123292979161 + 37332100 = 351131^2 + 6110^2 .

It is a cyclic number.

It is not a de Polignac number, because 123330311261 - 2¹⁰ = 123330310237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123330311261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123330311267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61665155630 + 61665155631.

It is an arithmetic number, because the mean of its divisors is an integer number (61665155631).

Almost surely, 2^123330311261 is an apocalyptic number.

It is an amenable number.

123330311261 is a deficient number, since it is larger than the sum of its proper divisors (1).

123330311261 is an equidigital number, since it uses as much as digits as its factorization.

123330311261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 123330311261 its reverse (162113033321), we get a palindrome (285443344582).

The spelling of 123330311261 in words is "one hundred twenty-three billion, three hundred thirty million, three hundred eleven thousand, two hundred sixty-one".