21110211120941 has 2 divisors, whose sum is σ = 21110211120942. Its totient is φ = 21110211120940.

The previous prime is 21110211120919. The next prime is 21110211120979. The reversal of 21110211120941 is 14902111201112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20866130658916 + 244080462025 = 4567946^2 + 494045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21110211120941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21110211120941.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110211120991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555105560470 + 10555105560471.

It is an arithmetic number, because the mean of its divisors is an integer number (10555105560471).

Almost surely, 2^{21110211120941} is an apocalyptic number.

It is an amenable number.

21110211120941 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110211120941 is an equidigital number, since it uses as much as digits as its factorization.

21110211120941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 26.

The spelling of 21110211120941 in words is "twenty-one trillion, one hundred ten billion, two hundred eleven million, one hundred twenty thousand, nine hundred forty-one".