21211002022211 has 2 divisors, whose sum is σ = 21211002022212. Its totient is φ = 21211002022210.

The previous prime is 21211002022207. The next prime is 21211002022241. The reversal of 21211002022211 is 11222020011212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21211002022211 - 2² = 21211002022207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21211002022211.

It is not a weakly prime, because it can be changed into another prime (21211002022241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605501011105 + 10605501011106.

It is an arithmetic number, because the mean of its divisors is an integer number (10605501011106).

Almost surely, 2^{21211002022211} is an apocalyptic number.

21211002022211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211002022211 is an equidigital number, since it uses as much as digits as its factorization.

21211002022211 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 17.

Adding to 21211002022211 its reverse (11222020011212), we get a palindrome (32433022033423).

The spelling of 21211002022211 in words is "twenty-one trillion, two hundred eleven billion, two million, twenty-two thousand, two hundred eleven".