21041022133 has 4 divisors (see below), whose sum is σ = 21046967788. Its totient is φ = 21035076480.

The previous prime is 21041022113. The next prime is 21041022137. The reversal of 21041022133 is 33122014012.

It is a happy number.

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 6143110884 + 14897911249 = 78378^2 + 122057^2 .

It is a cyclic number.

It is not a de Polignac number, because 21041022133 - 2²¹ = 21038924981 is a prime.

It is a super-2 number, since 2×21041022133² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21041022133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21041022137) 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, 2967516 + ... + 2974597.

It is an arithmetic number, because the mean of its divisors is an integer number (5261741947).

Almost surely, 2^21041022133 is an apocalyptic number.

It is an amenable number.

21041022133 is a deficient number, since it is larger than the sum of its proper divisors (5945655).

21041022133 is an equidigital number, since it uses as much as digits as its factorization.

21041022133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5945654.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21041022133 its reverse (33122014012), we get a palindrome (54163036145).

The spelling of 21041022133 in words is "twenty-one billion, forty-one million, twenty-two thousand, one hundred thirty-three".