21224452141231 has 4 divisors (see below), whose sum is σ = 21224467860264. Its totient is φ = 21224436422200.

The previous prime is 21224452141213. The next prime is 21224452141267. The reversal of 21224452141231 is 13214125442212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21224452141231 - 2⁷ = 21224452141103 is a prime.

It is a super-2 number, since 2×21224452141231² (a number of 27 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 (21224452141201) 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, 5621785 + ... + 8605426.

It is an arithmetic number, because the mean of its divisors is an integer number (5306116965066).

Almost surely, 2^{21224452141231} is an apocalyptic number.

21224452141231 is a deficient number, since it is larger than the sum of its proper divisors (15719033).

21224452141231 is a wasteful number, since it uses less digits than its factorization.

21224452141231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15719032.

The product of its digits is 30720, while the sum is 34.

Adding to 21224452141231 its reverse (13214125442212), we get a palindrome (34438577583443).

The spelling of 21224452141231 in words is "twenty-one trillion, two hundred twenty-four billion, four hundred fifty-two million, one hundred forty-one thousand, two hundred thirty-one".