161271133106422 has 4 divisors (see below), whose sum is σ = 241906699659636. Its totient is φ = 80635566553210.

The previous prime is 161271133106393. The next prime is 161271133106429. The reversal of 161271133106422 is 224601331172161.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161271133106429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40317783276604 + ... + 40317783276607.

It is an arithmetic number, because the mean of its divisors is an integer number (60476674914909).

Almost surely, 2^{161271133106422} is an apocalyptic number.

161271133106422 is a deficient number, since it is larger than the sum of its proper divisors (80635566553214).

161271133106422 is an equidigital number, since it uses as much as digits as its factorization.

161271133106422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80635566553213.

The product of its (nonzero) digits is 72576, while the sum is 40.

Adding to 161271133106422 its reverse (224601331172161), we get a palindrome (385872464278583).

The spelling of 161271133106422 in words is "one hundred sixty-one trillion, two hundred seventy-one billion, one hundred thirty-three million, one hundred six thousand, four hundred twenty-two".