125152435440221 has 16 divisors (see below), whose sum is σ = 143081763108864. Its totient is φ = 107235716068224.

The previous prime is 125152435440209. The next prime is 125152435440257. The reversal of 125152435440221 is 122044534251521.

It is a cyclic number.

It is not a de Polignac number, because 125152435440221 - 2¹⁰ = 125152435439197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125152435440421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247248836 + ... + 247754498.

It is an arithmetic number, because the mean of its divisors is an integer number (8942610194304).

Almost surely, 2^{125152435440221} is an apocalyptic number.

It is an amenable number.

125152435440221 is a deficient number, since it is larger than the sum of its proper divisors (17929327668643).

125152435440221 is an equidigital number, since it uses as much as digits as its factorization.

125152435440221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518060.

The product of its (nonzero) digits is 384000, while the sum is 41.

Adding to 125152435440221 its reverse (122044534251521), we get a palindrome (247196969691742).

The spelling of 125152435440221 in words is "one hundred twenty-five trillion, one hundred fifty-two billion, four hundred thirty-five million, four hundred forty thousand, two hundred twenty-one".