121224321131 has 4 divisors (see below), whose sum is σ = 121365444600. Its totient is φ = 121083197664.

The previous prime is 121224321091. The next prime is 121224321199. The reversal of 121224321131 is 131123422121.

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 121224321131 - 2²² = 121220126827 is a prime.

It is a super-2 number, since 2×121224321131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121224321097 and 121224321106.

It is not an unprimeable number, because it can be changed into a prime (121224321431) 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, 70560446 + ... + 70562163.

It is an arithmetic number, because the mean of its divisors is an integer number (30341361150).

Almost surely, 2^121224321131 is an apocalyptic number.

121224321131 is a deficient number, since it is larger than the sum of its proper divisors (141123469).

121224321131 is an equidigital number, since it uses as much as digits as its factorization.

121224321131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141123468.

The product of its digits is 576, while the sum is 23.

Adding to 121224321131 its reverse (131123422121), we get a palindrome (252347743252).

The spelling of 121224321131 in words is "one hundred twenty-one billion, two hundred twenty-four million, three hundred twenty-one thousand, one hundred thirty-one".