125000521201 has 2 divisors, whose sum is σ = 125000521202. Its totient is φ = 125000521200.

The previous prime is 125000521157. The next prime is 125000521237. The reversal of 125000521201 is 102125000521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103339746225 + 21660774976 = 321465^2 + 147176^2 .

It is an emirp because it is prime and its reverse (102125000521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125000521201 - 2¹⁷ = 125000390129 is a prime.

It is not a weakly prime, because it can be changed into another prime (125000528201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62500260600 + 62500260601.

It is an arithmetic number, because the mean of its divisors is an integer number (62500260601).

Almost surely, 2^125000521201 is an apocalyptic number.

It is an amenable number.

125000521201 is a deficient number, since it is larger than the sum of its proper divisors (1).

125000521201 is an equidigital number, since it uses as much as digits as its factorization.

125000521201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 200, while the sum is 19.

Adding to 125000521201 its reverse (102125000521), we get a palindrome (227125521722).

The spelling of 125000521201 in words is "one hundred twenty-five billion, five hundred twenty-one thousand, two hundred one".