11121010221 has 4 divisors (see below), whose sum is σ = 14828013632. Its totient is φ = 7414006812.

The previous prime is 11121010211. The next prime is 11121010231. The reversal of 11121010221 is 12201012111.

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 an interprime number because it is at equal distance from previous prime (11121010211) and next prime (11121010231).

It is not a de Polignac number, because 11121010221 - 2¹³ = 11121002029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121010197 and 11121010206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121010211) 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, 1853501701 + ... + 1853501706.

It is an arithmetic number, because the mean of its divisors is an integer number (3707003408).

Almost surely, 2^11121010221 is an apocalyptic number.

It is an amenable number.

11121010221 is a deficient number, since it is larger than the sum of its proper divisors (3707003411).

11121010221 is an equidigital number, since it uses as much as digits as its factorization.

11121010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707003410.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11121010221 its reverse (12201012111), we get a palindrome (23322022332).

The spelling of 11121010221 in words is "eleven billion, one hundred twenty-one million, ten thousand, two hundred twenty-one".