11221012111021 has 4 divisors (see below), whose sum is σ = 11221600572700. Its totient is φ = 11220423649344.

The previous prime is 11221012110949. The next prime is 11221012111027. The reversal of 11221012111021 is 12011121012211.

11221012111021 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.

It can be written as a sum of positive squares in 2 ways, for example, as 10835881404100 + 385130706921 = 3291790^2 + 620589^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221012111021 - 2³⁹ = 10671256297133 is a prime.

It is a super-2 number, since 2×11221012111021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11221012110986 and 11221012111004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221012111027) 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, 294202236 + ... + 294240373.

It is an arithmetic number, because the mean of its divisors is an integer number (2805400143175).

Almost surely, 2^{11221012111021} is an apocalyptic number.

It is an amenable number.

11221012111021 is a deficient number, since it is larger than the sum of its proper divisors (588461679).

11221012111021 is an equidigital number, since it uses as much as digits as its factorization.

11221012111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588461678.

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

Adding to 11221012111021 its reverse (12011121012211), we get a palindrome (23232133123232).

The spelling of 11221012111021 in words is "eleven trillion, two hundred twenty-one billion, twelve million, one hundred eleven thousand, twenty-one".