22011111111121 has 4 divisors (see below), whose sum is σ = 24012121212144. Its totient is φ = 20010101010100.

The previous prime is 22011111111053. The next prime is 22011111111131. The reversal of 22011111111121 is 12111111111022.

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 22011111111121 - 2¹⁹ = 22011110586833 is a prime.

It is a super-2 number, since 2×22011111111121² (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 = 22011111111095 and 22011111111104.

It is not an unprimeable number, because it can be changed into a prime (22011111111131) 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, 1000505050495 + ... + 1000505050516.

It is an arithmetic number, because the mean of its divisors is an integer number (6003030303036).

Almost surely, 2^{22011111111121} is an apocalyptic number.

It is an amenable number.

22011111111121 is a deficient number, since it is larger than the sum of its proper divisors (2001010101023).

22011111111121 is a wasteful number, since it uses less digits than its factorization.

22011111111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001010101022.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 22011111111121 its reverse (12111111111022), we get a palindrome (34122222222143).

Subtracting from 22011111111121 its reverse (12111111111022), we obtain a palindrome (9900000000099).

The spelling of 22011111111121 in words is "twenty-two trillion, eleven billion, one hundred eleven million, one hundred eleven thousand, one hundred twenty-one".