21112020112211 has 8 divisors (see below), whose sum is σ = 24191020437504. Its totient is φ = 18048769149960.

The previous prime is 21112020112147. The next prime is 21112020112241. The reversal of 21112020112211 is 11221102021112.

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 21112020112211 - 2⁶ = 21112020112147 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 21112020112211.

It is not an unprimeable number, because it can be changed into a prime (21112020112241) 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, 3937337885 + ... + 3937343246.

It is an arithmetic number, because the mean of its divisors is an integer number (3023877554688).

Almost surely, 2^{21112020112211} is an apocalyptic number.

21112020112211 is a deficient number, since it is larger than the sum of its proper divisors (3079000325293).

21112020112211 is an equidigital number, since it uses as much as digits as its factorization.

21112020112211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7874681521.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21112020112211 its reverse (11221102021112), we get a palindrome (32333122133323).

The spelling of 21112020112211 in words is "twenty-one trillion, one hundred twelve billion, twenty million, one hundred twelve thousand, two hundred eleven".