21142224404033 has 4 divisors (see below), whose sum is σ = 21284118527700. Its totient is φ = 21000330280368.

The previous prime is 21142224403991. The next prime is 21142224404039. The reversal of 21142224404033 is 33040442224112.

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 7875387041344 + 13266837362689 = 2806312^2 + 3642367^2 .

It is a cyclic number.

It is not a de Polignac number, because 21142224404033 - 2⁸ = 21142224403777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21142224404039) 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, 70947061610 + ... + 70947061907.

It is an arithmetic number, because the mean of its divisors is an integer number (5321029631925).

Almost surely, 2^{21142224404033} is an apocalyptic number.

It is an amenable number.

21142224404033 is a deficient number, since it is larger than the sum of its proper divisors (141894123667).

21142224404033 is a wasteful number, since it uses less digits than its factorization.

21142224404033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141894123666.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 21142224404033 its reverse (33040442224112), we get a palindrome (54182666628145).

The spelling of 21142224404033 in words is "twenty-one trillion, one hundred forty-two billion, two hundred twenty-four million, four hundred four thousand, thirty-three".