21224042214453 has 24 divisors (see below), whose sum is σ = 33019331599800. Its totient is φ = 13059305389440.

The previous prime is 21224042214451. The next prime is 21224042214503. The reversal of 21224042214453 is 35441224042212.

21224042214453 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 40 + 422 + 144 + 53 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3623609202084 + 17600433012369 = 1903578^2 + 4195287^2 .

It is not a de Polignac number, because 21224042214453 - 2¹ = 21224042214451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21224042214451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10480338 + ... + 12340403.

It is an arithmetic number, because the mean of its divisors is an integer number (1375805483325).

Almost surely, 2^{21224042214453} is an apocalyptic number.

It is an amenable number.

21224042214453 is a deficient number, since it is larger than the sum of its proper divisors (11795289385347).

21224042214453 is a wasteful number, since it uses less digits than its factorization.

21224042214453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22828709 (or 22828706 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 36.

Adding to 21224042214453 its reverse (35441224042212), we get a palindrome (56665266256665).

The spelling of 21224042214453 in words is "twenty-one trillion, two hundred twenty-four billion, forty-two million, two hundred fourteen thousand, four hundred fifty-three".