161313123421231 has 8 divisors (see below), whose sum is σ = 162026422614144. Its totient is φ = 160599847638360.

The previous prime is 161313123421217. The next prime is 161313123421259. The reversal of 161313123421231 is 132124321313161.

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 161313123421231 - 2⁷ = 161313123421103 is a prime.

It is a super-2 number, since 2×161313123421231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161313123421201) 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, 8032156 + ... + 19675918.

It is an arithmetic number, because the mean of its divisors is an integer number (20253302826768).

Almost surely, 2^{161313123421231} is an apocalyptic number.

161313123421231 is a deficient number, since it is larger than the sum of its proper divisors (713299192913).

161313123421231 is a wasteful number, since it uses less digits than its factorization.

161313123421231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11705021.

The product of its digits is 15552, while the sum is 34.

Adding to 161313123421231 its reverse (132124321313161), we get a palindrome (293437444734392).

The spelling of 161313123421231 in words is "one hundred sixty-one trillion, three hundred thirteen billion, one hundred twenty-three million, four hundred twenty-one thousand, two hundred thirty-one".