211122110200021 has 4 divisors (see below), whose sum is σ = 211179154816044. Its totient is φ = 211065065584000.

The previous prime is 211122110200009. The next prime is 211122110200033. The reversal of 211122110200021 is 120002011221112.

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 (211122110200009) and next prime (211122110200033).

It can be written as a sum of positive squares in 2 ways, for example, as 165645780419025 + 45476329780996 = 12870345^2 + 6743614^2 .

It is a cyclic number.

It is not a de Polignac number, because 211122110200021 - 2⁵ = 211122110199989 is a prime.

It is a super-2 number, since 2×211122110200021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211122110199968 and 211122110200004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211122110200121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28522302460 + ... + 28522309861.

It is an arithmetic number, because the mean of its divisors is an integer number (52794788704011).

Almost surely, 2^{211122110200021} is an apocalyptic number.

It is an amenable number.

211122110200021 is a deficient number, since it is larger than the sum of its proper divisors (57044616023).

211122110200021 is an equidigital number, since it uses as much as digits as its factorization.

211122110200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57044616022.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211122110200021 its reverse (120002011221112), we get a palindrome (331124121421133).

The spelling of 211122110200021 in words is "two hundred eleven trillion, one hundred twenty-two billion, one hundred ten million, two hundred thousand, twenty-one".