121454233405 has 4 divisors (see below), whose sum is σ = 145745080092. Its totient is φ = 97163386720.

The previous prime is 121454233399. The next prime is 121454233421. The reversal of 121454233405 is 504332454121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96041728836 + 25412504569 = 309906^2 + 159413^2 .

It is a de Polignac number, because none of the positive numbers 2^k-121454233405 is a prime.

It is a super-2 number, since 2×121454233405² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12145423336 + ... + 12145423345.

It is an arithmetic number, because the mean of its divisors is an integer number (36436270023).

Almost surely, 2^121454233405 is an apocalyptic number.

It is an amenable number.

121454233405 is a deficient number, since it is larger than the sum of its proper divisors (24290846687).

121454233405 is an equidigital number, since it uses as much as digits as its factorization.

121454233405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24290846686.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 121454233405 its reverse (504332454121), we get a palindrome (625786687526).

The spelling of 121454233405 in words is "one hundred twenty-one billion, four hundred fifty-four million, two hundred thirty-three thousand, four hundred five".