21002210220011 has 4 divisors (see below), whose sum is σ = 21004331451024. Its totient is φ = 21000088989000.

The previous prime is 21002210219987. The next prime is 21002210220023. The reversal of 21002210220011 is 11002201220012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21002210220011 - 2¹⁰ = 21002210218987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002210220071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060600655 + ... + 1060620456.

It is an arithmetic number, because the mean of its divisors is an integer number (5251082862756).

Almost surely, 2^{21002210220011} is an apocalyptic number.

21002210220011 is a deficient number, since it is larger than the sum of its proper divisors (2121231013).

21002210220011 is an equidigital number, since it uses as much as digits as its factorization.

21002210220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121231012.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21002210220011 its reverse (11002201220012), we get a palindrome (32004411440023).

The spelling of 21002210220011 in words is "twenty-one trillion, two billion, two hundred ten million, two hundred twenty thousand, eleven".