125221025056 has 12 divisors (see below), whose sum is σ = 246528893142. Its totient is φ = 62610512512.

The previous prime is 125221025009. The next prime is 125221025081. The reversal of 125221025056 is 650520122521.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 94285843600 + 30935181456 = 307060^2 + 175884^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1956578485 + ... + 1956578548.

Almost surely, 2^125221025056 is an apocalyptic number.

125221025056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

125221025056 is a deficient number, since it is larger than the sum of its proper divisors (121307868086).

125221025056 is an equidigital number, since it uses as much as digits as its factorization.

125221025056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3913157043 (or 3913157035 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 125221025056 its reverse (650520122521), we get a palindrome (775741147577).

The spelling of 125221025056 in words is "one hundred twenty-five billion, two hundred twenty-one million, twenty-five thousand, fifty-six".