22001311121 has 4 divisors (see below), whose sum is σ = 22006023972. Its totient is φ = 21996598272.

The previous prime is 22001311093. The next prime is 22001311133. The reversal of 22001311121 is 12111310022.

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 21327389521 + 673921600 = 146039^2 + 25960^2 .

It is a cyclic number.

It is not a de Polignac number, because 22001311121 - 2¹⁴ = 22001294737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22001311096 and 22001311105.

It is not an unprimeable number, because it can be changed into a prime (22001311621) 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, 2349416 + ... + 2358761.

It is an arithmetic number, because the mean of its divisors is an integer number (5501505993).

Almost surely, 2^22001311121 is an apocalyptic number.

It is an amenable number.

22001311121 is a deficient number, since it is larger than the sum of its proper divisors (4712851).

22001311121 is an equidigital number, since it uses as much as digits as its factorization.

22001311121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4712850.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 22001311121 its reverse (12111310022), we get a palindrome (34112621143).

The spelling of 22001311121 in words is "twenty-two billion, one million, three hundred eleven thousand, one hundred twenty-one".