11112212001221 has 4 divisors (see below), whose sum is σ = 11595351653472. Its totient is φ = 10629072348972.

The previous prime is 11112212001197. The next prime is 11112212001223. The reversal of 11112212001221 is 12210021221111.

11112212001221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11112212001221 - 2¹⁸ = 11112211739077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11112212001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112212001223) 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, 241569826091 + ... + 241569826136.

It is an arithmetic number, because the mean of its divisors is an integer number (2898837913368).

Almost surely, 2^{11112212001221} is an apocalyptic number.

It is an amenable number.

11112212001221 is a deficient number, since it is larger than the sum of its proper divisors (483139652251).

11112212001221 is an equidigital number, since it uses as much as digits as its factorization.

11112212001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483139652250.

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

Adding to 11112212001221 its reverse (12210021221111), we get a palindrome (23322233222332).

The spelling of 11112212001221 in words is "eleven trillion, one hundred twelve billion, two hundred twelve million, one thousand, two hundred twenty-one".