21022021201111 has 12 divisors (see below), whose sum is σ = 24646740595968. Its totient is φ = 17876994401952.

The previous prime is 21022021201091. The next prime is 21022021201121. The reversal of 21022021201111 is 11110212022012.

It is not a de Polignac number, because 21022021201111 - 2⁹ = 21022021200599 is a prime.

It is a super-2 number, since 2×21022021201111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022021201121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1689052206 + ... + 1689064651.

It is an arithmetic number, because the mean of its divisors is an integer number (2053895049664).

Almost surely, 2^{21022021201111} is an apocalyptic number.

21022021201111 is a deficient number, since it is larger than the sum of its proper divisors (3624719394857).

21022021201111 is a wasteful number, since it uses less digits than its factorization.

21022021201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3378116998 (or 3378116991 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21022021201111 its reverse (11110212022012), we get a palindrome (32132233223123).

The spelling of 21022021201111 in words is "twenty-one trillion, twenty-two billion, twenty-one million, two hundred one thousand, one hundred eleven".