125244312221 has 8 divisors (see below), whose sum is σ = 143750677824. Its totient is φ = 106891526880.

The previous prime is 125244312191. The next prime is 125244312241. The reversal of 125244312221 is 122213442521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125244312221 - 2³⁰ = 124170570397 is a prime.

It is a super-2 number, since 2×125244312221² (a number of 23 digits) contains 22 as substring.

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 (125244312241) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 38393315 + ... + 38396576.

It is an arithmetic number, because the mean of its divisors is an integer number (17968834728).

Almost surely, 2^125244312221 is an apocalyptic number.

It is an amenable number.

125244312221 is a deficient number, since it is larger than the sum of its proper divisors (18506365603).

125244312221 is an equidigital number, since it uses as much as digits as its factorization.

125244312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76790131.

The product of its digits is 7680, while the sum is 29.

Adding to 125244312221 its reverse (122213442521), we get a palindrome (247457754742).

The spelling of 125244312221 in words is "one hundred twenty-five billion, two hundred forty-four million, three hundred twelve thousand, two hundred twenty-one".