121534235434 has 4 divisors (see below), whose sum is σ = 182301353154. Its totient is φ = 60767117716.

The previous prime is 121534235429. The next prime is 121534235443. The reversal of 121534235434 is 434532435121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 434532435121 = 37483 ⋅11592787.

It can be written as a sum of positive squares in only one way, i.e., 92394721225 + 29139514209 = 303965^2 + 170703^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121534235393 and 121534235402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30383558857 + ... + 30383558860.

Almost surely, 2^121534235434 is an apocalyptic number.

121534235434 is a deficient number, since it is larger than the sum of its proper divisors (60767117720).

121534235434 is an equidigital number, since it uses as much as digits as its factorization.

121534235434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60767117719.

The product of its digits is 172800, while the sum is 37.

The spelling of 121534235434 in words is "one hundred twenty-one billion, five hundred thirty-four million, two hundred thirty-five thousand, four hundred thirty-four".