11122212100021 has 4 divisors (see below), whose sum is σ = 12133322290944. Its totient is φ = 10111101909100.

The previous prime is 11122212100019. The next prime is 11122212100031. The reversal of 11122212100021 is 12000121222111.

11122212100021 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 11122212100021 - 2¹ = 11122212100019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11122212099968 and 11122212100004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122212100031) 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, 505555095445 + ... + 505555095466.

It is an arithmetic number, because the mean of its divisors is an integer number (3033330572736).

Almost surely, 2^{11122212100021} is an apocalyptic number.

11122212100021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11122212100021 is a deficient number, since it is larger than the sum of its proper divisors (1011110190923).

11122212100021 is a wasteful number, since it uses less digits than its factorization.

11122212100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011110190922.

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

Adding to 11122212100021 its reverse (12000121222111), we get a palindrome (23122333322132).

The spelling of 11122212100021 in words is "eleven trillion, one hundred twenty-two billion, two hundred twelve million, one hundred thousand, twenty-one".