12121122431 has 8 divisors (see below), whose sum is σ = 13679010000. Its totient is φ = 10639229440.

The previous prime is 12121122421. The next prime is 12121122449. The reversal of 12121122431 is 13422112121.

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 12121122431 - 2¹⁴ = 12121106047 is a prime.

It is a super-2 number, since 2×12121122431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121122401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18998306 + ... + 18998943.

It is an arithmetic number, because the mean of its divisors is an integer number (1709876250).

Almost surely, 2^12121122431 is an apocalyptic number.

12121122431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12121122431 is a deficient number, since it is larger than the sum of its proper divisors (1557887569).

12121122431 is a wasteful number, since it uses less digits than its factorization.

12121122431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37997289.

The product of its digits is 192, while the sum is 20.

Adding to 12121122431 its reverse (13422112121), we get a palindrome (25543234552).

The spelling of 12121122431 in words is "twelve billion, one hundred twenty-one million, one hundred twenty-two thousand, four hundred thirty-one".