21112021210211 has 8 divisors (see below), whose sum is σ = 21207337404000. Its totient is φ = 21016732181760.

The previous prime is 21112021210201. The next prime is 21112021210213. The reversal of 21112021210211 is 11201212021112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21112021210211 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 21112021210211.

It is not an unprimeable number, because it can be changed into a prime (21112021210213) 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, 5232686 + ... + 8342963.

It is an arithmetic number, because the mean of its divisors is an integer number (2650917175500).

Almost surely, 2^{21112021210211} is an apocalyptic number.

21112021210211 is a deficient number, since it is larger than the sum of its proper divisors (95316193789).

21112021210211 is a wasteful number, since it uses less digits than its factorization.

21112021210211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13582669.

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

Adding to 21112021210211 its reverse (11201212021112), we get a palindrome (32313233231323).

The spelling of 21112021210211 in words is "twenty-one trillion, one hundred twelve billion, twenty-one million, two hundred ten thousand, two hundred eleven".