21022110112021 has 16 divisors (see below), whose sum is σ = 21206828635200. Its totient is φ = 20837991283200.

The previous prime is 21022110111949. The next prime is 21022110112079. The reversal of 21022110112021 is 12021101122012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21022110112021 is a prime.

It is a super-2 number, since 2×21022110112021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21022110111986 and 21022110112004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022110112121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379042725 + ... + 379098181.

It is an arithmetic number, because the mean of its divisors is an integer number (1325426789700).

Almost surely, 2^{21022110112021} is an apocalyptic number.

It is an amenable number.

21022110112021 is a deficient number, since it is larger than the sum of its proper divisors (184718523179).

21022110112021 is a wasteful number, since it uses less digits than its factorization.

21022110112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60804.

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

Adding to 21022110112021 its reverse (12021101122012), we get a palindrome (33043211234033).

The spelling of 21022110112021 in words is "twenty-one trillion, twenty-two billion, one hundred ten million, one hundred twelve thousand, twenty-one".