122161243 has 4 divisors (see below), whose sum is σ = 122262840. Its totient is φ = 122059648.

The previous prime is 122161219. The next prime is 122161261. The reversal of 122161243 is 342161221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342161221 = 6221 ⋅55001.

It is a cyclic number.

It is not a de Polignac number, because 122161243 - 2²⁵ = 88606811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122161283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48973 + ... + 51406.

It is an arithmetic number, because the mean of its divisors is an integer number (30565710).

Almost surely, 2^122161243 is an apocalyptic number.

122161243 is a deficient number, since it is larger than the sum of its proper divisors (101597).

122161243 is a wasteful number, since it uses less digits than its factorization.

122161243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101596.

The product of its digits is 576, while the sum is 22.

The square root of 122161243 is about 11052.6577346808. The cubic root of 122161243 is about 496.1859710083.

Subtracting from 122161243 its sum of digits (22), we obtain a palindrome (122161221).

The spelling of 122161243 in words is "one hundred twenty-two million, one hundred sixty-one thousand, two hundred forty-three".