21122001022211 has 4 divisors (see below), whose sum is σ = 21132546206952. Its totient is φ = 21111455837472.

The previous prime is 21122001022193. The next prime is 21122001022229. The reversal of 21122001022211 is 11222010022112.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21122001022193) and next prime (21122001022229).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21122001022211 is a prime.

It is a super-3 number, since 3×21122001022211³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 21122001022211.

It is not an unprimeable number, because it can be changed into a prime (21122001021211) 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 3 ways as a sum of consecutive naturals, for example, 5272589366 + ... + 5272593371.

It is an arithmetic number, because the mean of its divisors is an integer number (5283136551738).

Almost surely, 2^{21122001022211} is an apocalyptic number.

21122001022211 is a deficient number, since it is larger than the sum of its proper divisors (10545184741).

21122001022211 is a wasteful number, since it uses less digits than its factorization.

21122001022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10545184740.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21122001022211 its reverse (11222010022112), we get a palindrome (32344011044323).

The spelling of 21122001022211 in words is "twenty-one trillion, one hundred twenty-two billion, one million, twenty-two thousand, two hundred eleven".