21103343009941 has 2 divisors, whose sum is σ = 21103343009942. Its totient is φ = 21103343009940.

The previous prime is 21103343009891. The next prime is 21103343010031. The reversal of 21103343009941 is 14990034330112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20993166148900 + 110176861041 = 4581830^2 + 331929^2 .

It is a cyclic number.

It is not a de Polignac number, because 21103343009941 - 2¹³ = 21103343001749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21103343009894 and 21103343009903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21103343009341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551671504970 + 10551671504971.

It is an arithmetic number, because the mean of its divisors is an integer number (10551671504971).

Almost surely, 2^{21103343009941} is an apocalyptic number.

It is an amenable number.

21103343009941 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103343009941 is an equidigital number, since it uses as much as digits as its factorization.

21103343009941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The spelling of 21103343009941 in words is "twenty-one trillion, one hundred three billion, three hundred forty-three million, nine thousand, nine hundred forty-one".