11211120221 has 8 divisors (see below), whose sum is σ = 13487062080. Its totient is φ = 9103766688.

The previous prime is 11211120131. The next prime is 11211120229. The reversal of 11211120221 is 12202111211.

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-11211120221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11211120196 and 11211120205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211120229) 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, 42146936 + ... + 42147201.

It is an arithmetic number, because the mean of its divisors is an integer number (1685882760).

Almost surely, 2^11211120221 is an apocalyptic number.

It is an amenable number.

11211120221 is a deficient number, since it is larger than the sum of its proper divisors (2275941859).

11211120221 is an equidigital number, since it uses as much as digits as its factorization.

11211120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84294163.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11211120221 its reverse (12202111211), we get a palindrome (23413231432).

The spelling of 11211120221 in words is "eleven billion, two hundred eleven million, one hundred twenty thousand, two hundred twenty-one".