21222011141 has 2 divisors, whose sum is σ = 21222011142. Its totient is φ = 21222011140.

The previous prime is 21222011119. The next prime is 21222011143. The reversal of 21222011141 is 14111022212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17322508225 + 3899502916 = 131615^2 + 62446^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222011141 - 2²⁶ = 21154902277 is a prime.

Together with 21222011143, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222011143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611005570 + 10611005571.

It is an arithmetic number, because the mean of its divisors is an integer number (10611005571).

Almost surely, 2^21222011141 is an apocalyptic number.

It is an amenable number.

21222011141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222011141 is an equidigital number, since it uses as much as digits as its factorization.

21222011141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21222011141 its reverse (14111022212), we get a palindrome (35333033353).

The spelling of 21222011141 in words is "twenty-one billion, two hundred twenty-two million, eleven thousand, one hundred forty-one".