11210212112221 has 4 divisors (see below), whose sum is σ = 11213985326944. Its totient is φ = 11206438897500.

The previous prime is 11210212112189. The next prime is 11210212112287. The reversal of 11210212112221 is 12221121201211.

It is a happy number.

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 11210212112221 - 2⁵ = 11210212112189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11210212112291) 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, 1886602905 + ... + 1886608846.

It is an arithmetic number, because the mean of its divisors is an integer number (2803496331736).

Almost surely, 2^{11210212112221} is an apocalyptic number.

It is an amenable number.

11210212112221 is a deficient number, since it is larger than the sum of its proper divisors (3773214723).

11210212112221 is an equidigital number, since it uses as much as digits as its factorization.

11210212112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3773214722.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11210212112221 its reverse (12221121201211), we get a palindrome (23431333313432).

The spelling of 11210212112221 in words is "eleven trillion, two hundred ten billion, two hundred twelve million, one hundred twelve thousand, two hundred twenty-one".