22121302123 has 2 divisors, whose sum is σ = 22121302124. Its totient is φ = 22121302122.

The previous prime is 22121302111. The next prime is 22121302169. The reversal of 22121302123 is 32120312122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22121302123 - 2⁹ = 22121301611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22121302123.

It is not a weakly prime, because it can be changed into another prime (22121302103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060651061 + 11060651062.

It is an arithmetic number, because the mean of its divisors is an integer number (11060651062).

Almost surely, 2^22121302123 is an apocalyptic number.

22121302123 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121302123 is an equidigital number, since it uses as much as digits as its factorization.

22121302123 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 19.

Adding to 22121302123 its reverse (32120312122), we get a palindrome (54241614245).

Subtracting 22121302123 from its reverse (32120312122), we obtain a palindrome (9999009999).

The spelling of 22121302123 in words is "twenty-two billion, one hundred twenty-one million, three hundred two thousand, one hundred twenty-three".