125321435123 has 2 divisors, whose sum is σ = 125321435124. Its totient is φ = 125321435122.

The previous prime is 125321435077. The next prime is 125321435143. The reversal of 125321435123 is 321534123521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125321435123 - 2¹⁶ = 125321369587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125321435123.

It is not a weakly prime, because it can be changed into another prime (125321435143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62660717561 + 62660717562.

It is an arithmetic number, because the mean of its divisors is an integer number (62660717562).

Almost surely, 2^125321435123 is an apocalyptic number.

125321435123 is a deficient number, since it is larger than the sum of its proper divisors (1).

125321435123 is an equidigital number, since it uses as much as digits as its factorization.

125321435123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 32.

Adding to 125321435123 its reverse (321534123521), we get a palindrome (446855558644).

The spelling of 125321435123 in words is "one hundred twenty-five billion, three hundred twenty-one million, four hundred thirty-five thousand, one hundred twenty-three".