21020222210111 has 2 divisors, whose sum is σ = 21020222210112. Its totient is φ = 21020222210110.

The previous prime is 21020222210083. The next prime is 21020222210129. The reversal of 21020222210111 is 11101222202012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21020222210111 - 2³⁰ = 21019148468287 is a prime.

It is a super-3 number, since 3×21020222210111³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21020222210111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21020222210131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510111105055 + 10510111105056.

It is an arithmetic number, because the mean of its divisors is an integer number (10510111105056).

Almost surely, 2^{21020222210111} is an apocalyptic number.

21020222210111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020222210111 is an equidigital number, since it uses as much as digits as its factorization.

21020222210111 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 21020222210111 its reverse (11101222202012), we get a palindrome (32121444412123).

The spelling of 21020222210111 in words is "twenty-one trillion, twenty billion, two hundred twenty-two million, two hundred ten thousand, one hundred eleven".