22451313043021 has 4 divisors (see below), whose sum is σ = 22874922723132. Its totient is φ = 22027703362912.

The previous prime is 22451313042943. The next prime is 22451313043039. The reversal of 22451313043021 is 12034031315422.

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 13287585105796 + 9163727937225 = 3645214^2 + 3027165^2 .

It is a cyclic number.

It is not a de Polignac number, because 22451313043021 - 2¹¹ = 22451313040973 is a prime.

It is a super-2 number, since 2×22451313043021² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22451313043121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211804839976 + ... + 211804840081.

It is an arithmetic number, because the mean of its divisors is an integer number (5718730680783).

Almost surely, 2^{22451313043021} is an apocalyptic number.

It is an amenable number.

22451313043021 is a deficient number, since it is larger than the sum of its proper divisors (423609680111).

22451313043021 is an equidigital number, since it uses as much as digits as its factorization.

22451313043021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423609680110.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 22451313043021 its reverse (12034031315422), we get a palindrome (34485344358443).

The spelling of 22451313043021 in words is "twenty-two trillion, four hundred fifty-one billion, three hundred thirteen million, forty-three thousand, twenty-one".