21000211202041 has 2 divisors, whose sum is σ = 21000211202042. Its totient is φ = 21000211202040.

The previous prime is 21000211201939. The next prime is 21000211202051. The reversal of 21000211202041 is 14020211200012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19966562812816 + 1033648389225 = 4468396^2 + 1016685^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000211202041 - 2³⁵ = 20965851463673 is a prime.

It is not a weakly prime, because it can be changed into another prime (21000211202051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500105601020 + 10500105601021.

It is an arithmetic number, because the mean of its divisors is an integer number (10500105601021).

Almost surely, 2^{21000211202041} is an apocalyptic number.

It is an amenable number.

21000211202041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000211202041 is an equidigital number, since it uses as much as digits as its factorization.

21000211202041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21000211202041 its reverse (14020211200012), we get a palindrome (35020422402053).

The spelling of 21000211202041 in words is "twenty-one trillion, two hundred eleven million, two hundred two thousand, forty-one".