21002002220011 has 8 divisors (see below), whose sum is σ = 21694104879104. Its totient is φ = 20310813230760.

The previous prime is 21002002219951. The next prime is 21002002220027. The reversal of 21002002220011 is 11002220020012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21002002220011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21002002219973 and 21002002220000.

It is not an unprimeable number, because it can be changed into a prime (21002002220041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228370731 + ... + 228462676.

It is an arithmetic number, because the mean of its divisors is an integer number (2711763109888).

Almost surely, 2^{21002002220011} is an apocalyptic number.

21002002220011 is a deficient number, since it is larger than the sum of its proper divisors (692102659093).

21002002220011 is a wasteful number, since it uses less digits than its factorization.

21002002220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456834921.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21002002220011 its reverse (11002220020012), we get a palindrome (32004222240023).

The spelling of 21002002220011 in words is "twenty-one trillion, two billion, two million, two hundred twenty thousand, eleven".