121431134443 has 4 divisors (see below), whose sum is σ = 126710749008. Its totient is φ = 116151519880.

The previous prime is 121431134437. The next prime is 121431134449. The reversal of 121431134443 is 344431134121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344431134121 = 1163 ⋅296157467.

It is an interprime number because it is at equal distance from previous prime (121431134437) and next prime (121431134449).

It is a cyclic number.

It is not a de Polignac number, because 121431134443 - 2²¹ = 121429037291 is a prime.

It is a super-2 number, since 2×121431134443² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121431134449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2639807248 + ... + 2639807293.

It is an arithmetic number, because the mean of its divisors is an integer number (31677687252).

Almost surely, 2^121431134443 is an apocalyptic number.

121431134443 is a deficient number, since it is larger than the sum of its proper divisors (5279614565).

121431134443 is an equidigital number, since it uses as much as digits as its factorization.

121431134443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5279614564.

The product of its digits is 13824, while the sum is 31.

Adding to 121431134443 its reverse (344431134121), we get a palindrome (465862268564).

The spelling of 121431134443 in words is "one hundred twenty-one billion, four hundred thirty-one million, one hundred thirty-four thousand, four hundred forty-three".