22121003161 has 2 divisors, whose sum is σ = 22121003162. Its totient is φ = 22121003160.

The previous prime is 22121003141. The next prime is 22121003173. The reversal of 22121003161 is 16130012122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17439843600 + 4681159561 = 132060^2 + 68419^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121003161 - 2¹³ = 22120994969 is a prime.

It is not a weakly prime, because it can be changed into another prime (22121003141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060501580 + 11060501581.

It is an arithmetic number, because the mean of its divisors is an integer number (11060501581).

Almost surely, 2^22121003161 is an apocalyptic number.

It is an amenable number.

22121003161 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121003161 is an equidigital number, since it uses as much as digits as its factorization.

22121003161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 22121003161 its reverse (16130012122), we get a palindrome (38251015283).

The spelling of 22121003161 in words is "twenty-two billion, one hundred twenty-one million, three thousand, one hundred sixty-one".