21112002211211 has 2 divisors, whose sum is σ = 21112002211212. Its totient is φ = 21112002211210.

The previous prime is 21112002211207. The next prime is 21112002211217. The reversal of 21112002211211 is 11211220021112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21112002211211 - 2² = 21112002211207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21112002211211.

It is not a weakly prime, because it can be changed into another prime (21112002211217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556001105605 + 10556001105606.

It is an arithmetic number, because the mean of its divisors is an integer number (10556001105606).

Almost surely, 2^{21112002211211} is an apocalyptic number.

21112002211211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112002211211 is an equidigital number, since it uses as much as digits as its factorization.

21112002211211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21112002211211 its reverse (11211220021112), we get a palindrome (32323222232323).

The spelling of 21112002211211 in words is "twenty-one trillion, one hundred twelve billion, two million, two hundred eleven thousand, two hundred eleven".