125220500000 has 84 divisors (see below), whose sum is σ = 308157110226. Its totient is φ = 50088000000.

The previous prime is 125220499997. The next prime is 125220500023. The reversal of 125220500000 is 5022521.

It can be written as a sum of positive squares in 7 ways, for example, as 25447906576 + 99772593424 = 159524^2 + 315868^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 374780 + ... + 625220.

Almost surely, 2^125220500000 is an apocalyptic number.

125220500000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125220500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154078555113).

125220500000 is an abundant number, since it is smaller than the sum of its proper divisors (182936610226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125220500000 is an frugal number, since it uses more digits than its factorization.

125220500000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250481 (or 250448 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

Adding to 125220500000 its reverse (5022521), we get a palindrome (125225522521).

The spelling of 125220500000 in words is "one hundred twenty-five billion, two hundred twenty million, five hundred thousand".