11210211012221 has 8 divisors (see below), whose sum is σ = 12196994060664. Its totient is φ = 10241207838720.

The previous prime is 11210211012199. The next prime is 11210211012361. The reversal of 11210211012221 is 12221011201211.

It can be written as a sum of positive squares in 4 ways, for example, as 529641895225 + 10680569116996 = 727765^2 + 3268114^2 .

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-11210211012221 is a prime.

It is a super-2 number, since 2×11210211012221² (a number of 27 digits) contains 22 as substring.

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 11210211012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11210211014221) 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, 4444967420 + ... + 4444969941.

It is an arithmetic number, because the mean of its divisors is an integer number (1524624257583).

Almost surely, 2^{11210211012221} is an apocalyptic number.

It is an amenable number.

11210211012221 is a deficient number, since it is larger than the sum of its proper divisors (986783048443).

11210211012221 is an equidigital number, since it uses as much as digits as its factorization.

11210211012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8889937471.

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

Adding to 11210211012221 its reverse (12221011201211), we get a palindrome (23431222213432).

The spelling of 11210211012221 in words is "eleven trillion, two hundred ten billion, two hundred eleven million, twelve thousand, two hundred twenty-one".