125565411331 has 4 divisors (see below), whose sum is σ = 125586161712. Its totient is φ = 125544660952.

The previous prime is 125565411329. The next prime is 125565411383. The reversal of 125565411331 is 133114565521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125565411331 - 2¹ = 125565411329 is a prime.

It is a super-2 number, since 2×125565411331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125565411311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10366111 + ... + 10378216.

It is an arithmetic number, because the mean of its divisors is an integer number (31396540428).

Almost surely, 2^125565411331 is an apocalyptic number.

125565411331 is a deficient number, since it is larger than the sum of its proper divisors (20750381).

125565411331 is an equidigital number, since it uses as much as digits as its factorization.

125565411331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20750380.

The product of its digits is 54000, while the sum is 37.

Adding to 125565411331 its reverse (133114565521), we get a palindrome (258679976852).

The spelling of 125565411331 in words is "one hundred twenty-five billion, five hundred sixty-five million, four hundred eleven thousand, three hundred thirty-one".