125554121321 has 8 divisors (see below), whose sum is σ = 126739810944. Its totient is φ = 124368659440.

The previous prime is 125554121257. The next prime is 125554121423. The reversal of 125554121321 is 123121455521.

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

It is not a de Polignac number, because 125554121321 - 2⁶ = 125554121257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125554121921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1176251 + ... + 1278543.

It is an arithmetic number, because the mean of its divisors is an integer number (15842476368).

Almost surely, 2^125554121321 is an apocalyptic number.

It is an amenable number.

125554121321 is a deficient number, since it is larger than the sum of its proper divisors (1185689623).

125554121321 is a wasteful number, since it uses less digits than its factorization.

125554121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113871.

The product of its digits is 12000, while the sum is 32.

Adding to 125554121321 its reverse (123121455521), we get a palindrome (248675576842).

The spelling of 125554121321 in words is "one hundred twenty-five billion, five hundred fifty-four million, one hundred twenty-one thousand, three hundred twenty-one".