11001122212021 has 4 divisors (see below), whose sum is σ = 11235188642112. Its totient is φ = 10767055781932.

The previous prime is 11001122212013. The next prime is 11001122212063. The reversal of 11001122212021 is 12021222110011.

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 11001122212021 - 2³ = 11001122212013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11001122211986 and 11001122212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001122213021) 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, 117033214975 + ... + 117033215068.

It is an arithmetic number, because the mean of its divisors is an integer number (2808797160528).

Almost surely, 2^{11001122212021} is an apocalyptic number.

It is an amenable number.

11001122212021 is a deficient number, since it is larger than the sum of its proper divisors (234066430091).

11001122212021 is an equidigital number, since it uses as much as digits as its factorization.

11001122212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234066430090.

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

Adding to 11001122212021 its reverse (12021222110011), we get a palindrome (23022344322032).

It can be divided in two parts, 1100112 and 2212021, that added together give a palindrome (3312133).

The spelling of 11001122212021 in words is "eleven trillion, one billion, one hundred twenty-two million, two hundred twelve thousand, twenty-one".