22211221201121 has 4 divisors (see below), whose sum is σ = 22977125380500. Its totient is φ = 21445317021744.

The previous prime is 22211221201111. The next prime is 22211221201129. The reversal of 22211221201121 is 12110212211222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12627930816400 + 9583290384721 = 3553580^2 + 3095689^2 .

It is a cyclic number.

It is not a de Polignac number, because 22211221201121 - 2¹⁰ = 22211221200097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22211221201093 and 22211221201102.

It is not an unprimeable number, because it can be changed into a prime (22211221201129) 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, 382952089646 + ... + 382952089703.

It is an arithmetic number, because the mean of its divisors is an integer number (5744281345125).

Almost surely, 2^{22211221201121} is an apocalyptic number.

It is an amenable number.

22211221201121 is a deficient number, since it is larger than the sum of its proper divisors (765904179379).

22211221201121 is an equidigital number, since it uses as much as digits as its factorization.

22211221201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765904179378.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 22211221201121 its reverse (12110212211222), we get a palindrome (34321433412343).

It can be divided in two parts, 2221122 and 1201121, that added together give a palindrome (3422243).

The spelling of 22211221201121 in words is "twenty-two trillion, two hundred eleven billion, two hundred twenty-one million, two hundred one thousand, one hundred twenty-one".