22011202121 has 2 divisors, whose sum is σ = 22011202122. Its totient is φ = 22011202120.

The previous prime is 22011202093. The next prime is 22011202163. The reversal of 22011202121 is 12120211022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22004755600 + 6446521 = 148340^2 + 2539^2 .

It is a cyclic number.

It is not a de Polignac number, because 22011202121 - 2¹⁰ = 22011201097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22011202096 and 22011202105.

It is not a weakly prime, because it can be changed into another prime (22011202321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11005601060 + 11005601061.

It is an arithmetic number, because the mean of its divisors is an integer number (11005601061).

Almost surely, 2^22011202121 is an apocalyptic number.

It is an amenable number.

22011202121 is a deficient number, since it is larger than the sum of its proper divisors (1).

22011202121 is an equidigital number, since it uses as much as digits as its factorization.

22011202121 is an evil number, because the sum of its binary digits is even.

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

Adding to 22011202121 its reverse (12120211022), we get a palindrome (34131413143).

The spelling of 22011202121 in words is "twenty-two billion, eleven million, two hundred two thousand, one hundred twenty-one".