11020111101221 has 8 divisors (see below), whose sum is σ = 11058168735960. Its totient is φ = 10982117809152.

The previous prime is 11020111101199. The next prime is 11020111101269. The reversal of 11020111101221 is 12210111102011.

11020111101221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5180585688100 + 5839525413121 = 2276090^2 + 2416511^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11020111101221 - 2⁶ = 11020111101157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11020111101196 and 11020111101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020111109221) 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, 15742520 + ... + 16427633.

It is an arithmetic number, because the mean of its divisors is an integer number (1382271091995).

Almost surely, 2^{11020111101221} is an apocalyptic number.

It is an amenable number.

11020111101221 is a deficient number, since it is larger than the sum of its proper divisors (38057634739).

11020111101221 is an equidigital number, since it uses as much as digits as its factorization.

11020111101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32171335.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 11020111101221 its reverse (12210111102011), we get a palindrome (23230222203232).

The spelling of 11020111101221 in words is "eleven trillion, twenty billion, one hundred eleven million, one hundred one thousand, two hundred twenty-one".