125131340251 has 2 divisors, whose sum is σ = 125131340252. Its totient is φ = 125131340250.

The previous prime is 125131340233. The next prime is 125131340281. The reversal of 125131340251 is 152043131521.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125131340251 is a prime.

It is not a weakly prime, because it can be changed into another prime (125131340221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62565670125 + 62565670126.

It is an arithmetic number, because the mean of its divisors is an integer number (62565670126).

Almost surely, 2^125131340251 is an apocalyptic number.

125131340251 is a deficient number, since it is larger than the sum of its proper divisors (1).

125131340251 is an equidigital number, since it uses as much as digits as its factorization.

125131340251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 125131340251 its reverse (152043131521), we get a palindrome (277174471772).

The spelling of 125131340251 in words is "one hundred twenty-five billion, one hundred thirty-one million, three hundred forty thousand, two hundred fifty-one".