11122020111221 has 4 divisors (see below), whose sum is σ = 11262805176000. Its totient is φ = 10981235046444.

The previous prime is 11122020111211. The next prime is 11122020111253. The reversal of 11122020111221 is 12211102022111.

11122020111221 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 11122020111221 - 2¹⁴ = 11122020094837 is a prime.

It is a super-2 number, since 2×11122020111221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11122020111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122020111211) 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, 70392532271 + ... + 70392532428.

It is an arithmetic number, because the mean of its divisors is an integer number (2815701294000).

Almost surely, 2^{11122020111221} is an apocalyptic number.

It is an amenable number.

11122020111221 is a deficient number, since it is larger than the sum of its proper divisors (140785064779).

11122020111221 is an equidigital number, since it uses as much as digits as its factorization.

11122020111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140785064778.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11122020111221 its reverse (12211102022111), we get a palindrome (23333122133332).

The spelling of 11122020111221 in words is "eleven trillion, one hundred twenty-two billion, twenty million, one hundred eleven thousand, two hundred twenty-one".