125135005220 has 96 divisors (see below), whose sum is σ = 289430275680. Its totient is φ = 45233233920.

The previous prime is 125135005211. The next prime is 125135005291. The reversal of 125135005220 is 22500531521.

It can be written as a sum of positive squares in 16 ways, for example, as 51467274496 + 73667730724 = 226864^2 + 271418^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 125135005220.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1749602 + ... + 1819718.

It is an arithmetic number, because the mean of its divisors is an integer number (3014898705).

Almost surely, 2^125135005220 is an apocalyptic number.

125135005220 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 125135005220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144715137840).

125135005220 is an abundant number, since it is smaller than the sum of its proper divisors (164295270460).

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

125135005220 is a wasteful number, since it uses less digits than its factorization.

125135005220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70353 (or 70351 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 125135005220 its reverse (22500531521), we get a palindrome (147635536741).

The spelling of 125135005220 in words is "one hundred twenty-five billion, one hundred thirty-five million, five thousand, two hundred twenty".