22021021121 has 16 divisors (see below), whose sum is σ = 24679321920. Its totient is φ = 19472431680.

The previous prime is 22021021093. The next prime is 22021021133. The reversal of 22021021121 is 12112012022.

It is a cyclic number.

It is not a de Polignac number, because 22021021121 - 2¹⁴ = 22021004737 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22021021096 and 22021021105.

It is not an unprimeable number, because it can be changed into a prime (22021021171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2106710 + ... + 2117136.

It is an arithmetic number, because the mean of its divisors is an integer number (1542457620).

Almost surely, 2^22021021121 is an apocalyptic number.

It is an amenable number.

22021021121 is a deficient number, since it is larger than the sum of its proper divisors (2658300799).

22021021121 is a wasteful number, since it uses less digits than its factorization.

22021021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15664.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22021021121 its reverse (12112012022), we get a palindrome (34133033143).

Subtracting from 22021021121 its reverse (12112012022), we obtain a palindrome (9909009099).

The spelling of 22021021121 in words is "twenty-two billion, twenty-one million, twenty-one thousand, one hundred twenty-one".