21220131143 has 2 divisors, whose sum is σ = 21220131144. Its totient is φ = 21220131142.

The previous prime is 21220131091. The next prime is 21220131193. The reversal of 21220131143 is 34113102212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21220131143 - 2¹⁴ = 21220114759 is a prime.

It is a super-2 number, since 2×21220131143² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220131193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610065571 + 10610065572.

It is an arithmetic number, because the mean of its divisors is an integer number (10610065572).

Almost surely, 2^21220131143 is an apocalyptic number.

21220131143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220131143 is an equidigital number, since it uses as much as digits as its factorization.

21220131143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21220131143 its reverse (34113102212), we get a palindrome (55333233355).

The spelling of 21220131143 in words is "twenty-one billion, two hundred twenty million, one hundred thirty-one thousand, one hundred forty-three".