221210021143 has 2 divisors, whose sum is σ = 221210021144. Its totient is φ = 221210021142.

The previous prime is 221210021141. The next prime is 221210021159. The reversal of 221210021143 is 341120012122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221210021143 - 2¹ = 221210021141 is a prime.

Together with 221210021141, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 221210021143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221210021141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605010571 + 110605010572.

It is an arithmetic number, because the mean of its divisors is an integer number (110605010572).

Almost surely, 2^221210021143 is an apocalyptic number.

221210021143 is a deficient number, since it is larger than the sum of its proper divisors (1).

221210021143 is an equidigital number, since it uses as much as digits as its factorization.

221210021143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 221210021143 its reverse (341120012122), we get a palindrome (562330033265).

The spelling of 221210021143 in words is "two hundred twenty-one billion, two hundred ten million, twenty-one thousand, one hundred forty-three".