125221222321 has 8 divisors (see below), whose sum is σ = 134859145064. Its totient is φ = 115584088320.

The previous prime is 125221222261. The next prime is 125221222349. The reversal of 125221222321 is 123222122521.

It can be written as a sum of positive squares in 4 ways, for example, as 19637818225 + 105583404096 = 140135^2 + 324936^2 .

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 125221222321 - 2⁷ = 125221222193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125221222351) 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, 155995 + ... + 524191.

It is an arithmetic number, because the mean of its divisors is an integer number (16857393133).

Almost surely, 2^125221222321 is an apocalyptic number.

It is an amenable number.

125221222321 is a deficient number, since it is larger than the sum of its proper divisors (9637922743).

125221222321 is a wasteful number, since it uses less digits than its factorization.

125221222321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394371.

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

Adding to 125221222321 its reverse (123222122521), we get a palindrome (248443344842).

The spelling of 125221222321 in words is "one hundred twenty-five billion, two hundred twenty-one million, two hundred twenty-two thousand, three hundred twenty-one".