125665621223 has 4 divisors (see below), whose sum is σ = 125668653648. Its totient is φ = 125662588800.

The previous prime is 125665621199. The next prime is 125665621231. The reversal of 125665621223 is 322126566521.

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

It is a cyclic number.

It is not a de Polignac number, because 125665621223 - 2¹² = 125665617127 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 (125665626223) 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 3 ways as a sum of consecutive naturals, for example, 1453178 + ... + 1537223.

It is an arithmetic number, because the mean of its divisors is an integer number (31417163412).

Almost surely, 2^125665621223 is an apocalyptic number.

125665621223 is a deficient number, since it is larger than the sum of its proper divisors (3032425).

125665621223 is an equidigital number, since it uses as much as digits as its factorization.

125665621223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3032424.

The product of its digits is 259200, while the sum is 41.

The spelling of 125665621223 in words is "one hundred twenty-five billion, six hundred sixty-five million, six hundred twenty-one thousand, two hundred twenty-three".