125721050337 has 12 divisors (see below), whose sum is σ = 184084704804. Its totient is φ = 82665895680.

The previous prime is 125721050311. The next prime is 125721050339. The reversal of 125721050337 is 733050127521.

It is a happy number.

125721050337 is a `hidden beast` number, since 1 + 2 + 572 + 1 + 0 + 50 + 3 + 37 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 25231416336 + 100489634001 = 158844^2 + 317001^2 .

It is not a de Polignac number, because 125721050337 - 2⁷ = 125721050209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125721050339) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95677464 + ... + 95678777.

It is an arithmetic number, because the mean of its divisors is an integer number (15340392067).

Almost surely, 2^125721050337 is an apocalyptic number.

It is an amenable number.

125721050337 is a deficient number, since it is larger than the sum of its proper divisors (58363654467).

125721050337 is a wasteful number, since it uses less digits than its factorization.

125721050337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191356320 (or 191356317 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 36.

Adding to 125721050337 its reverse (733050127521), we get a palindrome (858771177858).

The spelling of 125721050337 in words is "one hundred twenty-five billion, seven hundred twenty-one million, fifty thousand, three hundred thirty-seven".