21022110012111 has 16 divisors (see below), whose sum is σ = 30276789029760. Its totient is φ = 12897599441760.

The previous prime is 21022110012107. The next prime is 21022110012121. The reversal of 21022110012111 is 11121001122012.

It is a happy number.

It is not a de Polignac number, because 21022110012111 - 2² = 21022110012107 is a prime.

It is a super-2 number, since 2×21022110012111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022110012121) 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, 814229481 + ... + 814255298.

It is an arithmetic number, because the mean of its divisors is an integer number (1892299314360).

Almost surely, 2^{21022110012111} is an apocalyptic number.

21022110012111 is a deficient number, since it is larger than the sum of its proper divisors (9254679017649).

21022110012111 is a wasteful number, since it uses less digits than its factorization.

21022110012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628485126.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21022110012111 its reverse (11121001122012), we get a palindrome (32143111134123).

The spelling of 21022110012111 in words is "twenty-one trillion, twenty-two billion, one hundred ten million, twelve thousand, one hundred eleven".