125312101 has 2 divisors, whose sum is σ = 125312102. Its totient is φ = 125312100.

The previous prime is 125312093. The next prime is 125312123. The reversal of 125312101 is 101213521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83722500 + 41589601 = 9150^2 + 6449^2 .

It is a cyclic number.

It is not a de Polignac number, because 125312101 - 2³ = 125312093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125312171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62656050 + 62656051.

It is an arithmetic number, because the mean of its divisors is an integer number (62656051).

Almost surely, 2^125312101 is an apocalyptic number.

It is an amenable number.

125312101 is a deficient number, since it is larger than the sum of its proper divisors (1).

125312101 is an equidigital number, since it uses as much as digits as its factorization.

125312101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 125312101 is about 11194.2887670455. The cubic root of 125312101 is about 500.4157888102.

Adding to 125312101 its reverse (101213521), we get a palindrome (226525622).

The spelling of 125312101 in words is "one hundred twenty-five million, three hundred twelve thousand, one hundred one".