21202022220011 has 4 divisors (see below), whose sum is σ = 21719144713224. Its totient is φ = 20684899726800.

The previous prime is 21202022219981. The next prime is 21202022220031. The reversal of 21202022220011 is 11002222020212.

It is a happy number.

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 21202022220011 - 2¹⁸ = 21202021957867 is a prime.

It is a super-3 number, since 3×21202022220011³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202022220031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258561246545 + ... + 258561246626.

It is an arithmetic number, because the mean of its divisors is an integer number (5429786178306).

Almost surely, 2^{21202022220011} is an apocalyptic number.

21202022220011 is a deficient number, since it is larger than the sum of its proper divisors (517122493213).

21202022220011 is an equidigital number, since it uses as much as digits as its factorization.

21202022220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517122493212.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21202022220011 its reverse (11002222020212), we get a palindrome (32204244240223).

The spelling of 21202022220011 in words is "twenty-one trillion, two hundred two billion, twenty-two million, two hundred twenty thousand, eleven".