21020222212211 has 2 divisors, whose sum is σ = 21020222212212. Its totient is φ = 21020222212210.

The previous prime is 21020222212147. The next prime is 21020222212307. The reversal of 21020222212211 is 11221222202012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21020222212211 - 2⁶ = 21020222212147 is a prime.

It is a super-3 number, since 3×21020222212211³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21020222212411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510111106105 + 10510111106106.

It is an arithmetic number, because the mean of its divisors is an integer number (10510111106106).

Almost surely, 2^{21020222212211} is an apocalyptic number.

21020222212211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020222212211 is an equidigital number, since it uses as much as digits as its factorization.

21020222212211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21020222212211 its reverse (11221222202012), we get a palindrome (32241444414223).

The spelling of 21020222212211 in words is "twenty-one trillion, twenty billion, two hundred twenty-two million, two hundred twelve thousand, two hundred eleven".