22121101121 has 4 divisors (see below), whose sum is σ = 25281258432. Its totient is φ = 18960943812.

The previous prime is 22121101111. The next prime is 22121101147. The reversal of 22121101121 is 12110112122.

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 22121101121 - 2¹⁰ = 22121100097 is a prime.

It is a super-2 number, since 2×22121101121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22121101096 and 22121101105.

It is not an unprimeable number, because it can be changed into a prime (22121101111) 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, 1580078645 + ... + 1580078658.

It is an arithmetic number, because the mean of its divisors is an integer number (6320314608).

Almost surely, 2^22121101121 is an apocalyptic number.

It is an amenable number.

22121101121 is a deficient number, since it is larger than the sum of its proper divisors (3160157311).

22121101121 is an equidigital number, since it uses as much as digits as its factorization.

22121101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160157310.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 22121101121 its reverse (12110112122), we get a palindrome (34231213243).

It can be divided in two parts, 22 and 121101121, that multiplied together give a palindrome (2664224662).

The spelling of 22121101121 in words is "twenty-two billion, one hundred twenty-one million, one hundred one thousand, one hundred twenty-one".