11121120220021 has 4 divisors (see below), whose sum is σ = 12709851680032. Its totient is φ = 9532388760012.

The previous prime is 11121120219977. The next prime is 11121120220027. The reversal of 11121120220021 is 12002202112111.

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 11121120220021 - 2¹⁵ = 11121120187253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121120219977 and 11121120220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121120220027) 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, 794365729995 + ... + 794365730008.

It is an arithmetic number, because the mean of its divisors is an integer number (3177462920008).

Almost surely, 2^{11121120220021} is an apocalyptic number.

It is an amenable number.

11121120220021 is a deficient number, since it is larger than the sum of its proper divisors (1588731460011).

11121120220021 is an equidigital number, since it uses as much as digits as its factorization.

11121120220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588731460010.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11121120220021 its reverse (12002202112111), we get a palindrome (23123322332132).

The spelling of 11121120220021 in words is "eleven trillion, one hundred twenty-one billion, one hundred twenty million, two hundred twenty thousand, twenty-one".