161420104011 has 4 divisors (see below), whose sum is σ = 215226805352. Its totient is φ = 107613402672.

The previous prime is 161420104003. The next prime is 161420104033. The reversal of 161420104011 is 110401024161.

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

It is not a de Polignac number, because 161420104011 - 2³ = 161420104003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161420174011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26903350666 + ... + 26903350671.

It is an arithmetic number, because the mean of its divisors is an integer number (53806701338).

Almost surely, 2^161420104011 is an apocalyptic number.

161420104011 is a deficient number, since it is larger than the sum of its proper divisors (53806701341).

161420104011 is an equidigital number, since it uses as much as digits as its factorization.

161420104011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53806701340.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 161420104011 its reverse (110401024161), we get a palindrome (271821128172).

The spelling of 161420104011 in words is "one hundred sixty-one billion, four hundred twenty million, one hundred four thousand, eleven".