21211102141 has 2 divisors, whose sum is σ = 21211102142. Its totient is φ = 21211102140.

The previous prime is 21211102127. The next prime is 21211102217. The reversal of 21211102141 is 14120111212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20413265625 + 797836516 = 142875^2 + 28246^2 .

It is a cyclic number.

It is not a de Polignac number, because 21211102141 - 2⁷ = 21211102013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21211102841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605551070 + 10605551071.

It is an arithmetic number, because the mean of its divisors is an integer number (10605551071).

Almost surely, 2^21211102141 is an apocalyptic number.

It is an amenable number.

21211102141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211102141 is an equidigital number, since it uses as much as digits as its factorization.

21211102141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21211102141 its reverse (14120111212), we get a palindrome (35331213353).

The spelling of 21211102141 in words is "twenty-one billion, two hundred eleven million, one hundred two thousand, one hundred forty-one".