125141054021 has 2 divisors, whose sum is σ = 125141054022. Its totient is φ = 125141054020.

The previous prime is 125141054009. The next prime is 125141054057. The reversal of 125141054021 is 120450141521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122199184900 + 2941869121 = 349570^2 + 54239^2 .

It is a cyclic number.

It is not a de Polignac number, because 125141054021 - 2¹⁰ = 125141052997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125141054921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62570527010 + 62570527011.

It is an arithmetic number, because the mean of its divisors is an integer number (62570527011).

Almost surely, 2^125141054021 is an apocalyptic number.

It is an amenable number.

125141054021 is a deficient number, since it is larger than the sum of its proper divisors (1).

125141054021 is an equidigital number, since it uses as much as digits as its factorization.

125141054021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 26.

Adding to 125141054021 its reverse (120450141521), we get a palindrome (245591195542).

The spelling of 125141054021 in words is "one hundred twenty-five billion, one hundred forty-one million, fifty-four thousand, twenty-one".