21110225141 has 2 divisors, whose sum is σ = 21110225142. Its totient is φ = 21110225140.

The previous prime is 21110225137. The next prime is 21110225161. The reversal of 21110225141 is 14152201112.

It is an a-pointer prime, because the next prime (21110225161) can be obtained adding 21110225141 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18380580625 + 2729644516 = 135575^2 + 52246^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110225141 - 2² = 21110225137 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110225161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555112570 + 10555112571.

It is an arithmetic number, because the mean of its divisors is an integer number (10555112571).

Almost surely, 2^21110225141 is an apocalyptic number.

It is an amenable number.

21110225141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110225141 is an equidigital number, since it uses as much as digits as its factorization.

21110225141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 21110225141 its reverse (14152201112), we get a palindrome (35262426253).

The spelling of 21110225141 in words is "twenty-one billion, one hundred ten million, two hundred twenty-five thousand, one hundred forty-one".