11112211010221 has 4 divisors (see below), whose sum is σ = 11151476773792. Its totient is φ = 11072945246652.

The previous prime is 11112211010207. The next prime is 11112211010227. The reversal of 11112211010221 is 12201011221111.

11112211010221 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 11112211010221 - 2¹³ = 11112211002029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11112211010195 and 11112211010204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112211010227) 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, 19632881361 + ... + 19632881926.

It is an arithmetic number, because the mean of its divisors is an integer number (2787869193448).

Almost surely, 2^{11112211010221} is an apocalyptic number.

It is an amenable number.

11112211010221 is a deficient number, since it is larger than the sum of its proper divisors (39265763571).

11112211010221 is an equidigital number, since it uses as much as digits as its factorization.

11112211010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39265763570.

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

Adding to 11112211010221 its reverse (12201011221111), we get a palindrome (23313222231332).

The spelling of 11112211010221 in words is "eleven trillion, one hundred twelve billion, two hundred eleven million, ten thousand, two hundred twenty-one".