22221120021121 has 12 divisors (see below), whose sum is σ = 25982990937732. Its totient is φ = 18947986864128.

The previous prime is 22221120021103. The next prime is 22221120021181. The reversal of 22221120021121 is 12112002112222.

It can be written as a sum of positive squares in 2 ways, for example, as 11129156209521 + 11091963811600 = 3336039^2 + 3330460^2 .

It is not a de Polignac number, because 22221120021121 - 2⁴¹ = 20022096765569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22221120021181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1174840920 + ... + 1174859833.

It is an arithmetic number, because the mean of its divisors is an integer number (2165249244811).

Almost surely, 2^{22221120021121} is an apocalyptic number.

It is an amenable number.

22221120021121 is a deficient number, since it is larger than the sum of its proper divisors (3761870916611).

22221120021121 is a wasteful number, since it uses less digits than its factorization.

22221120021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349700960 (or 2349700953 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22221120021121 its reverse (12112002112222), we get a palindrome (34333122133343).

The spelling of 22221120021121 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred twenty million, twenty-one thousand, one hundred twenty-one".