21011101020941 has 2 divisors, whose sum is σ = 21011101020942. Its totient is φ = 21011101020940.

The previous prime is 21011101020929. The next prime is 21011101021037. The reversal of 21011101020941 is 14902010111012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17741188296841 + 3269912724100 = 4212029^2 + 1808290^2 .

It is a cyclic number.

It is not a de Polignac number, because 21011101020941 - 2¹⁰ = 21011101019917 is a prime.

It is a super-2 number, since 2×21011101020941² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21011101020241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505550510470 + 10505550510471.

It is an arithmetic number, because the mean of its divisors is an integer number (10505550510471).

Almost surely, 2^{21011101020941} is an apocalyptic number.

It is an amenable number.

21011101020941 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011101020941 is an equidigital number, since it uses as much as digits as its factorization.

21011101020941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 23.

Adding to 21011101020941 its reverse (14902010111012), we get a palindrome (35913111131953).

The spelling of 21011101020941 in words is "twenty-one trillion, eleven billion, one hundred one million, twenty thousand, nine hundred forty-one".