121232435455 has 16 divisors (see below), whose sum is σ = 146126006208. Its totient is φ = 96555328000.

The previous prime is 121232435453. The next prime is 121232435477. The reversal of 121232435455 is 554534232121.

It is a happy number.

It is not a de Polignac number, because 121232435455 - 2¹ = 121232435453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121232435453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1229175 + ... + 1324135.

It is an arithmetic number, because the mean of its divisors is an integer number (9132875388).

Almost surely, 2^121232435455 is an apocalyptic number.

121232435455 is a deficient number, since it is larger than the sum of its proper divisors (24893570753).

121232435455 is an equidigital number, since it uses as much as digits as its factorization.

121232435455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96098.

The product of its digits is 144000, while the sum is 37.

Adding to 121232435455 its reverse (554534232121), we get a palindrome (675766667576).

It can be divided in two parts, 12123 and 2435455, that added together give a triangular number (2447578 = T₂₂₁₂).

The spelling of 121232435455 in words is "one hundred twenty-one billion, two hundred thirty-two million, four hundred thirty-five thousand, four hundred fifty-five".