161012405121 has 8 divisors (see below), whose sum is σ = 214952574144. Its totient is φ = 107206919760.

The previous prime is 161012405111. The next prime is 161012405137. The reversal of 161012405121 is 121504210161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161012405121 - 2⁵ = 161012405089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161012405091 and 161012405100.

It is not an unprimeable number, because it can be changed into a prime (161012405111) 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, 33668125 + ... + 33672906.

It is an arithmetic number, because the mean of its divisors is an integer number (26869071768).

Almost surely, 2^161012405121 is an apocalyptic number.

It is an amenable number.

161012405121 is a deficient number, since it is larger than the sum of its proper divisors (53940169023).

161012405121 is an equidigital number, since it uses as much as digits as its factorization.

161012405121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67341831.

The product of its (nonzero) digits is 480, while the sum is 24.

Adding to 161012405121 its reverse (121504210161), we get a palindrome (282516615282).

The spelling of 161012405121 in words is "one hundred sixty-one billion, twelve million, four hundred five thousand, one hundred twenty-one".