11133541621 has 32 divisors (see below), whose sum is σ = 12598426368. Its totient is φ = 9783459840.

The previous prime is 11133541613. The next prime is 11133541631. The reversal of 11133541621 is 12614533111.

It is a cyclic number.

It is not a de Polignac number, because 11133541621 - 2³ = 11133541613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11133541621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11133541631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2958381 + ... + 2962141.

It is an arithmetic number, because the mean of its divisors is an integer number (393700824).

Almost surely, 2^11133541621 is an apocalyptic number.

It is an amenable number.

11133541621 is a deficient number, since it is larger than the sum of its proper divisors (1464884747).

11133541621 is a wasteful number, since it uses less digits than its factorization.

11133541621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3981.

The product of its digits is 2160, while the sum is 28.

The spelling of 11133541621 in words is "eleven billion, one hundred thirty-three million, five hundred forty-one thousand, six hundred twenty-one".