11553773134221 has 24 divisors (see below), whose sum is σ = 16730211126720. Its totient is φ = 7683396350400.

The previous prime is 11553773134199. The next prime is 11553773134249. The reversal of 11553773134221 is 12243137735511.

It is a happy number.

11553773134221 is a `hidden beast` number, since 1 + 1 + 5 + 537 + 73 + 1 + 3 + 42 + 2 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-11553773134221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11553773134261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 153132376 + ... + 153207806.

It is an arithmetic number, because the mean of its divisors is an integer number (697092130280).

Almost surely, 2^{11553773134221} is an apocalyptic number.

It is an amenable number.

11553773134221 is a deficient number, since it is larger than the sum of its proper divisors (5176437992499).

11553773134221 is a wasteful number, since it uses less digits than its factorization.

11553773134221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117457 (or 117454 counting only the distinct ones).

The product of its digits is 529200, while the sum is 45.

The spelling of 11553773134221 in words is "eleven trillion, five hundred fifty-three billion, seven hundred seventy-three million, one hundred thirty-four thousand, two hundred twenty-one".