21220102011011 has 16 divisors (see below), whose sum is σ = 21544734119040. Its totient is φ = 20897772604800.

The previous prime is 21220102010957. The next prime is 21220102011029. The reversal of 21220102011011 is 11011020102212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21220102011011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220102001011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75408470 + ... + 75689348.

It is an arithmetic number, because the mean of its divisors is an integer number (1346545882440).

Almost surely, 2^{21220102011011} is an apocalyptic number.

21220102011011 is a deficient number, since it is larger than the sum of its proper divisors (324632108029).

21220102011011 is a wasteful number, since it uses less digits than its factorization.

21220102011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284974.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21220102011011 its reverse (11011020102212), we get a palindrome (32231122113223).

The spelling of 21220102011011 in words is "twenty-one trillion, two hundred twenty billion, one hundred two million, eleven thousand, eleven".