125221204321 has 8 divisors (see below), whose sum is σ = 128130971904. Its totient is φ = 122321665440.

The previous prime is 125221204309. The next prime is 125221204337. The reversal of 125221204321 is 123402122521.

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 125221204321 - 2⁵ = 125221204289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125221204351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2532405 + ... + 2581378.

It is an arithmetic number, because the mean of its divisors is an integer number (16016371488).

Almost surely, 2^125221204321 is an apocalyptic number.

It is an amenable number.

125221204321 is a deficient number, since it is larger than the sum of its proper divisors (2909767583).

125221204321 is an equidigital number, since it uses as much as digits as its factorization.

125221204321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5114351.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 125221204321 its reverse (123402122521), we get a palindrome (248623326842).

The spelling of 125221204321 in words is "one hundred twenty-five billion, two hundred twenty-one million, two hundred four thousand, three hundred twenty-one".