125335432021 has 4 divisors (see below), whose sum is σ = 129657343500. Its totient is φ = 121013520544.

The previous prime is 125335431937. The next prime is 125335432031. The reversal of 125335432021 is 120234533521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47095510225 + 78239921796 = 217015^2 + 279714^2 .

It is a cyclic number.

It is not a de Polignac number, because 125335432021 - 2¹⁵ = 125335399253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125335432031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2160955696 + ... + 2160955753.

It is an arithmetic number, because the mean of its divisors is an integer number (32414335875).

Almost surely, 2^125335432021 is an apocalyptic number.

It is an amenable number.

125335432021 is a deficient number, since it is larger than the sum of its proper divisors (4321911479).

125335432021 is an equidigital number, since it uses as much as digits as its factorization.

125335432021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4321911478.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 125335432021 its reverse (120234533521), we get a palindrome (245569965542).

The spelling of 125335432021 in words is "one hundred twenty-five billion, three hundred thirty-five million, four hundred thirty-two thousand, twenty-one".