21010220022211 has 8 divisors (see below), whose sum is σ = 24011737320704. Its totient is φ = 18008717047560.

The previous prime is 21010220022199. The next prime is 21010220022217. The reversal of 21010220022211 is 11222002201012.

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 not a de Polignac number, because 21010220022211 - 2¹⁷ = 21010219891139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21010220022217) 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, 228585 + ... + 6486346.

It is an arithmetic number, because the mean of its divisors is an integer number (3001467165088).

Almost surely, 2^{21010220022211} is an apocalyptic number.

21010220022211 is a deficient number, since it is larger than the sum of its proper divisors (3001517298493).

21010220022211 is an equidigital number, since it uses as much as digits as its factorization.

21010220022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7161921.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21010220022211 its reverse (11222002201012), we get a palindrome (32232222223223).

The spelling of 21010220022211 in words is "twenty-one trillion, ten billion, two hundred twenty million, twenty-two thousand, two hundred eleven".