22000121357 has 2 divisors, whose sum is σ = 22000121358. Its totient is φ = 22000121356.

The previous prime is 22000121293. The next prime is 22000121359. The reversal of 22000121357 is 75312100022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18652457476 + 3347663881 = 136574^2 + 57859^2 .

It is a cyclic number.

It is not a de Polignac number, because 22000121357 - 2⁶ = 22000121293 is a prime.

Together with 22000121359, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22000121359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000060678 + 11000060679.

It is an arithmetic number, because the mean of its divisors is an integer number (11000060679).

Almost surely, 2^22000121357 is an apocalyptic number.

It is an amenable number.

22000121357 is a deficient number, since it is larger than the sum of its proper divisors (1).

22000121357 is an equidigital number, since it uses as much as digits as its factorization.

22000121357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

Adding to 22000121357 its reverse (75312100022), we get a palindrome (97312221379).

The spelling of 22000121357 in words is "twenty-two billion, one hundred twenty-one thousand, three hundred fifty-seven".