22000121993 has 2 divisors, whose sum is σ = 22000121994. Its totient is φ = 22000121992.

The previous prime is 22000121977. The next prime is 22000122029. The reversal of 22000121993 is 39912100022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12747990649 + 9252131344 = 112907^2 + 96188^2 .

It is a cyclic number.

It is not a de Polignac number, because 22000121993 - 2⁴ = 22000121977 is a prime.

It is not a weakly prime, because it can be changed into another prime (22000121953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000060996 + 11000060997.

It is an arithmetic number, because the mean of its divisors is an integer number (11000060997).

Almost surely, 2^22000121993 is an apocalyptic number.

It is an amenable number.

22000121993 is a deficient number, since it is larger than the sum of its proper divisors (1).

22000121993 is an equidigital number, since it uses as much as digits as its factorization.

22000121993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 22000121993 in words is "twenty-two billion, one hundred twenty-one thousand, nine hundred ninety-three".