11210212011221 has 4 divisors (see below), whose sum is σ = 11697612533472. Its totient is φ = 10722811488972.

The previous prime is 11210212011209. The next prime is 11210212011283. The reversal of 11210212011221 is 12211021201211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11210212011221 - 2¹⁰ = 11210212010197 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 11210212011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11210212011421) 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, 243700261091 + ... + 243700261136.

It is an arithmetic number, because the mean of its divisors is an integer number (2924403133368).

Almost surely, 2^{11210212011221} is an apocalyptic number.

It is an amenable number.

11210212011221 is a deficient number, since it is larger than the sum of its proper divisors (487400522251).

11210212011221 is an equidigital number, since it uses as much as digits as its factorization.

11210212011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487400522250.

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

Adding to 11210212011221 its reverse (12211021201211), we get a palindrome (23421233212432).

The spelling of 11210212011221 in words is "eleven trillion, two hundred ten billion, two hundred twelve million, eleven thousand, two hundred twenty-one".