11133554021 has 4 divisors (see below), whose sum is σ = 11343621132. Its totient is φ = 10923486912.

The previous prime is 11133553987. The next prime is 11133554027. The reversal of 11133554021 is 12045533111.

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 4428237025 + 6705316996 = 66545^2 + 81886^2 .

It is a cyclic number.

It is not a de Polignac number, because 11133554021 - 2⁶ = 11133553957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11133554027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105033476 + ... + 105033581.

It is an arithmetic number, because the mean of its divisors is an integer number (2835905283).

Almost surely, 2^11133554021 is an apocalyptic number.

It is an amenable number.

11133554021 is a deficient number, since it is larger than the sum of its proper divisors (210067111).

11133554021 is an equidigital number, since it uses as much as digits as its factorization.

11133554021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210067110.

The product of its (nonzero) digits is 1800, while the sum is 26.

The spelling of 11133554021 in words is "eleven billion, one hundred thirty-three million, five hundred fifty-four thousand, twenty-one".