121112634161 has 4 divisors (see below), whose sum is σ = 121135096932. Its totient is φ = 121090171392.

The previous prime is 121112634157. The next prime is 121112634187. The reversal of 121112634161 is 161436211121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161436211121 = 17 ⋅9496247713.

It can be written as a sum of positive squares in 2 ways, for example, as 65925697600 + 55186936561 = 256760^2 + 234919^2 .

It is a cyclic number.

It is not a de Polignac number, because 121112634161 - 2² = 121112634157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121112634121) 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, 11223296 + ... + 11234081.

It is an arithmetic number, because the mean of its divisors is an integer number (30283774233).

Almost surely, 2^121112634161 is an apocalyptic number.

It is an amenable number.

121112634161 is a deficient number, since it is larger than the sum of its proper divisors (22462771).

121112634161 is an equidigital number, since it uses as much as digits as its factorization.

121112634161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22462770.

The product of its digits is 1728, while the sum is 29.

Adding to 121112634161 its reverse (161436211121), we get a palindrome (282548845282).

The spelling of 121112634161 in words is "one hundred twenty-one billion, one hundred twelve million, six hundred thirty-four thousand, one hundred sixty-one".