431661351141221 has 8 divisors (see below), whose sum is σ = 450447502887360. Its totient is φ = 412876721637952.

The previous prime is 431661351141203. The next prime is 431661351141271. The reversal of 431661351141221 is 122141153166134.

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 431661351141221 - 2³⁰ = 431660277399397 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 (431661351141271) 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, 379981220 + ... + 381115533.

It is an arithmetic number, because the mean of its divisors is an integer number (56305937860920).

Almost surely, 2^{431661351141221} is an apocalyptic number.

It is an amenable number.

431661351141221 is a deficient number, since it is larger than the sum of its proper divisors (18786151746139).

431661351141221 is a wasteful number, since it uses less digits than its factorization.

431661351141221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761121435.

The product of its digits is 103680, while the sum is 41.

The spelling of 431661351141221 in words is "four hundred thirty-one trillion, six hundred sixty-one billion, three hundred fifty-one million, one hundred forty-one thousand, two hundred twenty-one".