121633233413355 has 80 divisors (see below), whose sum is σ = 221809980268800. Its totient is φ = 63749813175360.

The previous prime is 121633233413221. The next prime is 121633233413359. The reversal of 121633233413355 is 553314332336121.

It is a happy number.

121633233413355 is a `hidden beast` number, since 1 + 2 + 1 + 63 + 3 + 233 + 4 + 1 + 3 + 355 = 666.

It is not a de Polignac number, because 121633233413355 - 2²¹ = 121633231316203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 121633233413355.

It is not an unprimeable number, because it can be changed into a prime (121633233413359) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 69361410 + ... + 71093400.

It is an arithmetic number, because the mean of its divisors is an integer number (2772624753360).

Almost surely, 2^{121633233413355} is an apocalyptic number.

121633233413355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121633233413355 is a deficient number, since it is larger than the sum of its proper divisors (100176746855445).

121633233413355 is a wasteful number, since it uses less digits than its factorization.

121633233413355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735006 (or 1734997 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 45.

Adding to 121633233413355 its reverse (553314332336121), we get a palindrome (674947565749476).

The spelling of 121633233413355 in words is "one hundred twenty-one trillion, six hundred thirty-three billion, two hundred thirty-three million, four hundred thirteen thousand, three hundred fifty-five".