21133210043 has 32 divisors (see below), whose sum is σ = 25010337792. Its totient is φ = 17668627200.

The previous prime is 21133210039. The next prime is 21133210073. The reversal of 21133210043 is 34001233112.

It is a cyclic number.

It is not a de Polignac number, because 21133210043 - 2² = 21133210039 is a prime.

It is a super-4 number, since 4×21133210043⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 21133209997 and 21133210024.

It is not an unprimeable number, because it can be changed into a prime (21133210013) 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, 523055 + ... + 562007.

It is an arithmetic number, because the mean of its divisors is an integer number (781573056).

Almost surely, 2^21133210043 is an apocalyptic number.

21133210043 is a deficient number, since it is larger than the sum of its proper divisors (3877127749).

21133210043 is a wasteful number, since it uses less digits than its factorization.

21133210043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39075.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21133210043 its reverse (34001233112), we get a palindrome (55134443155).

The spelling of 21133210043 in words is "twenty-one billion, one hundred thirty-three million, two hundred ten thousand, forty-three".