21110222022021 has 24 divisors (see below), whose sum is σ = 33972349567104. Its totient is φ = 12521859610560.

The previous prime is 21110222022007. The next prime is 21110222022053. The reversal of 21110222022021 is 12022022201112.

It is a happy number.

21110222022021 is a `hidden beast` number, since 211 + 10 + 2 + 220 + 220 + 2 + 1 = 666.

It is not a de Polignac number, because 21110222022021 - 2⁵ = 21110222021989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21110222021985 and 21110222022003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110222022091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2268448176 + ... + 2268457481.

It is an arithmetic number, because the mean of its divisors is an integer number (1415514565296).

Almost surely, 2^{21110222022021} is an apocalyptic number.

It is an amenable number.

21110222022021 is a deficient number, since it is larger than the sum of its proper divisors (12862127545083).

21110222022021 is a wasteful number, since it uses less digits than its factorization.

21110222022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4536905721 (or 4536905718 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21110222022021 its reverse (12022022201112), we get a palindrome (33132244223133).

The spelling of 21110222022021 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty-two million, twenty-two thousand, twenty-one".