11221021122121 has 4 divisors (see below), whose sum is σ = 11811601181200. Its totient is φ = 10630441063044.

The previous prime is 11221021122089. The next prime is 11221021122137. The reversal of 11221021122121 is 12122112012211.

It is a happy number.

11221021122121 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 11221021122121 - 2⁵ = 11221021122089 is a prime.

It is a super-2 number, since 2×11221021122121² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 590580059059 = 11221021122121 / (1 + 1 + 2 + 2 + 1 + 0 + 2 + 1 + 1 + 2 + 2 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221021122151) 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, 295290029511 + ... + 295290029548.

It is an arithmetic number, because the mean of its divisors is an integer number (2952900295300).

Almost surely, 2^{11221021122121} is an apocalyptic number.

It is an amenable number.

11221021122121 is a deficient number, since it is larger than the sum of its proper divisors (590580059079).

11221021122121 is an equidigital number, since it uses as much as digits as its factorization.

11221021122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590580059078.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11221021122121 its reverse (12122112012211), we get a palindrome (23343133134332).

The spelling of 11221021122121 in words is "eleven trillion, two hundred twenty-one billion, twenty-one million, one hundred twenty-two thousand, one hundred twenty-one".