121214443231 has 4 divisors (see below), whose sum is σ = 138530792272. Its totient is φ = 103898094192.

The previous prime is 121214443201. The next prime is 121214443253. The reversal of 121214443231 is 132344412121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132344412121 = 643 ⋅205823347.

It is a cyclic number.

It is not a de Polignac number, because 121214443231 - 2¹³ = 121214435039 is a prime.

It is a super-2 number, since 2×121214443231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121214443231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121214443201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8658174510 + ... + 8658174523.

It is an arithmetic number, because the mean of its divisors is an integer number (34632698068).

Almost surely, 2^121214443231 is an apocalyptic number.

121214443231 is a deficient number, since it is larger than the sum of its proper divisors (17316349041).

121214443231 is an equidigital number, since it uses as much as digits as its factorization.

121214443231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17316349040.

The product of its digits is 4608, while the sum is 28.

Adding to 121214443231 its reverse (132344412121), we get a palindrome (253558855352).

The spelling of 121214443231 in words is "one hundred twenty-one billion, two hundred fourteen million, four hundred forty-three thousand, two hundred thirty-one".