21133610111430 has 96 divisors (see below), whose sum is σ = 55533043710144. Its totient is φ = 5575602106368.

The previous prime is 21133610111413. The next prime is 21133610111441. The reversal of 21133610111430 is 3411101633112.

21133610111430 is a `hidden beast` number, since 2 + 1 + 1 + 3 + 3 + 610 + 1 + 1 + 1 + 43 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 21133610111394 and 21133610111403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24926242 + ... + 25760138.

It is an arithmetic number, because the mean of its divisors is an integer number (578469205314).

Almost surely, 2^{21133610111430} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21133610111430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27766521855072).

21133610111430 is an abundant number, since it is smaller than the sum of its proper divisors (34399433598714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21133610111430 is a wasteful number, since it uses less digits than its factorization.

21133610111430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836910 (or 836907 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

Adding to 21133610111430 its reverse (3411101633112), we get a palindrome (24544711744542).

The spelling of 21133610111430 in words is "twenty-one trillion, one hundred thirty-three billion, six hundred ten million, one hundred eleven thousand, four hundred thirty".