161113301111 has 4 divisors (see below), whose sum is σ = 184129486992. Its totient is φ = 138097115232.

The previous prime is 161113301101. The next prime is 161113301123. The reversal of 161113301111 is 111103311161.

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

It is a cyclic number.

It is not a de Polignac number, because 161113301111 - 2¹⁴ = 161113284727 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 (161113301101) 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, 11508092930 + ... + 11508092943.

It is an arithmetic number, because the mean of its divisors is an integer number (46032371748).

Almost surely, 2^161113301111 is an apocalyptic number.

161113301111 is a deficient number, since it is larger than the sum of its proper divisors (23016185881).

161113301111 is an equidigital number, since it uses as much as digits as its factorization.

161113301111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23016185880.

The product of its (nonzero) digits is 54, while the sum is 20.

Adding to 161113301111 its reverse (111103311161), we get a palindrome (272216612272).

The spelling of 161113301111 in words is "one hundred sixty-one billion, one hundred thirteen million, three hundred one thousand, one hundred eleven".