22122202261 has 2 divisors, whose sum is σ = 22122202262. Its totient is φ = 22122202260.

The previous prime is 22122202253. The next prime is 22122202307. The reversal of 22122202261 is 16220222122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21610764036 + 511438225 = 147006^2 + 22615^2 .

It is a cyclic number.

It is not a de Polignac number, because 22122202261 - 2³ = 22122202253 is a prime.

It is a super-3 number, since 3×22122202261³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22122202961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11061101130 + 11061101131.

It is an arithmetic number, because the mean of its divisors is an integer number (11061101131).

Almost surely, 2^22122202261 is an apocalyptic number.

It is an amenable number.

22122202261 is a deficient number, since it is larger than the sum of its proper divisors (1).

22122202261 is an equidigital number, since it uses as much as digits as its factorization.

22122202261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 22122202261 its reverse (16220222122), we get a palindrome (38342424383).

The spelling of 22122202261 in words is "twenty-two billion, one hundred twenty-two million, two hundred two thousand, two hundred sixty-one".