121232313161 has 4 divisors (see below), whose sum is σ = 122186898432. Its totient is φ = 120277727892.

The previous prime is 121232313143. The next prime is 121232313217. The reversal of 121232313161 is 161313232121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121232313161 - 2³⁴ = 104052443977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121232313161.

It is not an unprimeable number, because it can be changed into a prime (121232313131) 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, 477292445 + ... + 477292698.

It is an arithmetic number, because the mean of its divisors is an integer number (30546724608).

Almost surely, 2^121232313161 is an apocalyptic number.

It is an amenable number.

121232313161 is a deficient number, since it is larger than the sum of its proper divisors (954585271).

121232313161 is an equidigital number, since it uses as much as digits as its factorization.

121232313161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954585270.

The product of its digits is 1296, while the sum is 26.

Adding to 121232313161 its reverse (161313232121), we get a palindrome (282545545282).

The spelling of 121232313161 in words is "one hundred twenty-one billion, two hundred thirty-two million, three hundred thirteen thousand, one hundred sixty-one".