21220002111011 has 16 divisors (see below), whose sum is σ = 24780474460800. Its totient is φ = 17965843963200.

The previous prime is 21220002110971. The next prime is 21220002111047. The reversal of 21220002111011 is 11011120002212.

It is a cyclic number.

It is not a de Polignac number, because 21220002111011 - 2³⁴ = 21202822241827 is a prime.

It is a super-2 number, since 2×21220002111011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220002111311) 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, 860420810 + ... + 860445471.

It is an arithmetic number, because the mean of its divisors is an integer number (1548779653800).

Almost surely, 2^{21220002111011} is an apocalyptic number.

21220002111011 is a deficient number, since it is larger than the sum of its proper divisors (3560472349789).

21220002111011 is a wasteful number, since it uses less digits than its factorization.

21220002111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720866370.

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

Adding to 21220002111011 its reverse (11011120002212), we get a palindrome (32231122113223).

The spelling of 21220002111011 in words is "twenty-one trillion, two hundred twenty billion, two million, one hundred eleven thousand, eleven".