21331121022133 has 4 divisors (see below), whose sum is σ = 22971976485388. Its totient is φ = 19690265558880.

The previous prime is 21331121022103. The next prime is 21331121022181. The reversal of 21331121022133 is 33122012113312.

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 12939682369329 + 8391438652804 = 3597177^2 + 2896798^2 .

It is a cyclic number.

It is not a de Polignac number, because 21331121022133 - 2¹⁷ = 21331120891061 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21331121022098 and 21331121022107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331121022103) 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, 820427731608 + ... + 820427731633.

It is an arithmetic number, because the mean of its divisors is an integer number (5742994121347).

Almost surely, 2^{21331121022133} is an apocalyptic number.

It is an amenable number.

21331121022133 is a deficient number, since it is larger than the sum of its proper divisors (1640855463255).

21331121022133 is a wasteful number, since it uses less digits than its factorization.

21331121022133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640855463254.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21331121022133 its reverse (33122012113312), we get a palindrome (54453133135445).

The spelling of 21331121022133 in words is "twenty-one trillion, three hundred thirty-one billion, one hundred twenty-one million, twenty-two thousand, one hundred thirty-three".