121031161 has 8 divisors (see below), whose sum is σ = 125595648. Its totient is φ = 116508000.

The previous prime is 121031149. The next prime is 121031201. The reversal of 121031161 is 161130121.

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

It is a cyclic number.

It is not a de Polignac number, because 121031161 - 2²³ = 112642553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121031101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4300 + ... + 16141.

It is an arithmetic number, because the mean of its divisors is an integer number (15699456).

Almost surely, 2^121031161 is an apocalyptic number.

It is an amenable number.

121031161 is a deficient number, since it is larger than the sum of its proper divisors (4564487).

121031161 is a wasteful number, since it uses less digits than its factorization.

121031161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20663.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 121031161 is about 11001.4163179111. The cubic root of 121031161 is about 494.6511993668.

Adding to 121031161 its reverse (161130121), we get a palindrome (282161282).

The spelling of 121031161 in words is "one hundred twenty-one million, thirty-one thousand, one hundred sixty-one".