122121131 has 4 divisors (see below), whose sum is σ = 133223064. Its totient is φ = 111019200.

The previous prime is 122121119. The next prime is 122121187. The reversal of 122121131 is 131121221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122121131 - 2¹⁰ = 122120107 is a prime.

It is a super-2 number, since 2×122121131² = 29827141273438322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122121631) 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 3 ways as a sum of consecutive naturals, for example, 5550950 + ... + 5550971.

It is an arithmetic number, because the mean of its divisors is an integer number (33305766).

Almost surely, 2^122121131 is an apocalyptic number.

122121131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122121131 is a deficient number, since it is larger than the sum of its proper divisors (11101933).

122121131 is a wasteful number, since it uses less digits than its factorization.

122121131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11101932.

The product of its digits is 24, while the sum is 14.

The square root of 122121131 is about 11050.8429995182. The cubic root of 122121131 is about 496.1316570269.

Adding to 122121131 its reverse (131121221), we get a palindrome (253242352).

The spelling of 122121131 in words is "one hundred twenty-two million, one hundred twenty-one thousand, one hundred thirty-one".