21022112102011 has 4 divisors (see below), whose sum is σ = 21029815333800. Its totient is φ = 21014408870224.

The previous prime is 21022112101967. The next prime is 21022112102053. The reversal of 21022112102011 is 11020121122012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21022112102011 - 2¹⁵ = 21022112069243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21022112102071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3851611801 + ... + 3851617258.

It is an arithmetic number, because the mean of its divisors is an integer number (5257453833450).

Almost surely, 2^{21022112102011} is an apocalyptic number.

21022112102011 is a deficient number, since it is larger than the sum of its proper divisors (7703231789).

21022112102011 is an equidigital number, since it uses as much as digits as its factorization.

21022112102011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7703231788.

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

Adding to 21022112102011 its reverse (11020121122012), we get a palindrome (32042233224023).

The spelling of 21022112102011 in words is "twenty-one trillion, twenty-two billion, one hundred twelve million, one hundred two thousand, eleven".