121430144431 has 4 divisors (see below), whose sum is σ = 126709715952. Its totient is φ = 116150572912.

The previous prime is 121430144417. The next prime is 121430144443. The reversal of 121430144431 is 134441034121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134441034121 = 109519 ⋅1227559.

It is a cyclic number.

It is not a de Polignac number, because 121430144431 - 2¹⁷ = 121430013359 is a prime.

It is a super-2 number, since 2×121430144431² (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 121430144431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121430144131) 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, 2639785726 + ... + 2639785771.

It is an arithmetic number, because the mean of its divisors is an integer number (31677428988).

Almost surely, 2^121430144431 is an apocalyptic number.

121430144431 is a deficient number, since it is larger than the sum of its proper divisors (5279571521).

121430144431 is an equidigital number, since it uses as much as digits as its factorization.

121430144431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5279571520.

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

Adding to 121430144431 its reverse (134441034121), we get a palindrome (255871178552).

The spelling of 121430144431 in words is "one hundred twenty-one billion, four hundred thirty million, one hundred forty-four thousand, four hundred thirty-one".