21000202411 has 2 divisors, whose sum is σ = 21000202412. Its totient is φ = 21000202410.

The previous prime is 21000202351. The next prime is 21000202441. The reversal of 21000202411 is 11420200012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21000202411 - 2⁷ = 21000202283 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21000202391 and 21000202400.

It is not a weakly prime, because it can be changed into another prime (21000202441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500101205 + 10500101206.

It is an arithmetic number, because the mean of its divisors is an integer number (10500101206).

Almost surely, 2^21000202411 is an apocalyptic number.

21000202411 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000202411 is an equidigital number, since it uses as much as digits as its factorization.

21000202411 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 13.

Adding to 21000202411 its reverse (11420200012), we get a palindrome (32420402423).

The spelling of 21000202411 in words is "twenty-one billion, two hundred two thousand, four hundred eleven".