21000002022011 has 16 divisors (see below), whose sum is σ = 21969352202400. Its totient is φ = 20047022569728.

The previous prime is 21000002022007. The next prime is 21000002022059. The reversal of 21000002022011 is 11022020000012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21000002022011 - 2² = 21000002022007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21000002021983 and 21000002022001.

It is not an unprimeable number, because it can be changed into a prime (21000002022611) 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, 53041061 + ... + 53435513.

It is an arithmetic number, because the mean of its divisors is an integer number (1373084512650).

Almost surely, 2^{21000002022011} is an apocalyptic number.

21000002022011 is a deficient number, since it is larger than the sum of its proper divisors (969350180389).

21000002022011 is a wasteful number, since it uses less digits than its factorization.

21000002022011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415198.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21000002022011 its reverse (11022020000012), we get a palindrome (32022022022023).

The spelling of 21000002022011 in words is "twenty-one trillion, two million, twenty-two thousand, eleven".