22030121261 has 2 divisors, whose sum is σ = 22030121262. Its totient is φ = 22030121260.

The previous prime is 22030121249. The next prime is 22030121339. The reversal of 22030121261 is 16212103022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13003981225 + 9026140036 = 114035^2 + 95006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22030121261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22030121221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11015060630 + 11015060631.

It is an arithmetic number, because the mean of its divisors is an integer number (11015060631).

Almost surely, 2^22030121261 is an apocalyptic number.

It is an amenable number.

22030121261 is a deficient number, since it is larger than the sum of its proper divisors (1).

22030121261 is an equidigital number, since it uses as much as digits as its factorization.

22030121261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 22030121261 its reverse (16212103022), we get a palindrome (38242224283).

The spelling of 22030121261 in words is "twenty-two billion, thirty million, one hundred twenty-one thousand, two hundred sixty-one".