321125423340561 has 16 divisors (see below), whose sum is σ = 490530394032000. Its totient is φ = 183051586055808.

The previous prime is 321125423340487. The next prime is 321125423340613. The reversal of 321125423340561 is 165043324521123.

It is not a de Polignac number, because 321125423340561 - 2¹⁸ = 321125423078417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321125423342561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18693985086 + ... + 18694002263.

It is an arithmetic number, because the mean of its divisors is an integer number (30658149627000).

Almost surely, 2^{321125423340561} is an apocalyptic number.

It is an amenable number.

321125423340561 is a deficient number, since it is larger than the sum of its proper divisors (169404970691439).

321125423340561 is a wasteful number, since it uses less digits than its factorization.

321125423340561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37387987768.

The product of its (nonzero) digits is 518400, while the sum is 42.

Adding to 321125423340561 its reverse (165043324521123), we get a palindrome (486168747861684).

The spelling of 321125423340561 in words is "three hundred twenty-one trillion, one hundred twenty-five billion, four hundred twenty-three million, three hundred forty thousand, five hundred sixty-one".