125131055123 has 2 divisors, whose sum is σ = 125131055124. Its totient is φ = 125131055122.

The previous prime is 125131055113. The next prime is 125131055131. The reversal of 125131055123 is 321550131521.

It is a strong prime.

It is an emirp because it is prime and its reverse (321550131521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125131055123 - 2¹⁶ = 125130989587 is a prime.

It is not a weakly prime, because it can be changed into another prime (125131055113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62565527561 + 62565527562.

It is an arithmetic number, because the mean of its divisors is an integer number (62565527562).

Almost surely, 2^125131055123 is an apocalyptic number.

125131055123 is a deficient number, since it is larger than the sum of its proper divisors (1).

125131055123 is an equidigital number, since it uses as much as digits as its factorization.

125131055123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 29.

Adding to 125131055123 its reverse (321550131521), we get a palindrome (446681186644).

The spelling of 125131055123 in words is "one hundred twenty-five billion, one hundred thirty-one million, fifty-five thousand, one hundred twenty-three".