123261525029 has 2 divisors, whose sum is σ = 123261525030. Its totient is φ = 123261525028.

The previous prime is 123261525001. The next prime is 123261525097. The reversal of 123261525029 is 920525162321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71219596900 + 52041928129 = 266870^2 + 228127^2 .

It is an emirp because it is prime and its reverse (920525162321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123261525029 - 2¹² = 123261520933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123261524983 and 123261525001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123264525029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61630762514 + 61630762515.

It is an arithmetic number, because the mean of its divisors is an integer number (61630762515).

Almost surely, 2^123261525029 is an apocalyptic number.

It is an amenable number.

123261525029 is a deficient number, since it is larger than the sum of its proper divisors (1).

123261525029 is an equidigital number, since it uses as much as digits as its factorization.

123261525029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 123261525029 in words is "one hundred twenty-three billion, two hundred sixty-one million, five hundred twenty-five thousand, twenty-nine".