122181971 has 4 divisors (see below), whose sum is σ = 122245872. Its totient is φ = 122118072.

The previous prime is 122181967. The next prime is 122181977. The reversal of 122181971 is 179181221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179181221 = 13099 ⋅13679.

It is a cyclic number.

It is not a de Polignac number, because 122181971 - 2² = 122181967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122181977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28991 + ... + 32936.

It is an arithmetic number, because the mean of its divisors is an integer number (30561468).

Almost surely, 2^122181971 is an apocalyptic number.

122181971 is a deficient number, since it is larger than the sum of its proper divisors (63901).

122181971 is an equidigital number, since it uses as much as digits as its factorization.

122181971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63900.

The product of its digits is 2016, while the sum is 32.

The square root of 122181971 is about 11053.5953879270. The cubic root of 122181971 is about 496.2140332669.

The spelling of 122181971 in words is "one hundred twenty-two million, one hundred eighty-one thousand, nine hundred seventy-one".