21220011001101 has 16 divisors (see below), whose sum is σ = 30884535152640. Its totient is φ = 12852669142320.

The previous prime is 21220011001099. The next prime is 21220011001121. The reversal of 21220011001101 is 10110011002212.

It is not a de Polignac number, because 21220011001101 - 2¹ = 21220011001099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220011001121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198535405 + ... + 198642258.

It is an arithmetic number, because the mean of its divisors is an integer number (1930283447040).

Almost surely, 2^{21220011001101} is an apocalyptic number.

It is an amenable number.

21220011001101 is a deficient number, since it is larger than the sum of its proper divisors (9664524151539).

21220011001101 is a wasteful number, since it uses less digits than its factorization.

21220011001101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397179296.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21220011001101 its reverse (10110011002212), we get a palindrome (31330022003313).

The spelling of 21220011001101 in words is "twenty-one trillion, two hundred twenty billion, eleven million, one thousand, one hundred one".