21210222212011 has 8 divisors (see below), whose sum is σ = 24651105719040. Its totient is φ = 17872051645608.

The previous prime is 21210222212009. The next prime is 21210222212071. The reversal of 21210222212011 is 11021222201212.

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 21210222212011 - 2¹ = 21210222212009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21210222212011.

It is not an unprimeable number, because it can be changed into a prime (21210222212071) 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 7 ways as a sum of consecutive naturals, for example, 25678234711 + ... + 25678235536.

It is an arithmetic number, because the mean of its divisors is an integer number (3081388214880).

Almost surely, 2^{21210222212011} is an apocalyptic number.

21210222212011 is a deficient number, since it is larger than the sum of its proper divisors (3440883507029).

21210222212011 is an equidigital number, since it uses as much as digits as its factorization.

21210222212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51356470313.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21210222212011 its reverse (11021222201212), we get a palindrome (32231444413223).

The spelling of 21210222212011 in words is "twenty-one trillion, two hundred ten billion, two hundred twenty-two million, two hundred twelve thousand, eleven".