22012021123 has 2 divisors, whose sum is σ = 22012021124. Its totient is φ = 22012021122.

The previous prime is 22012021121. The next prime is 22012021153. The reversal of 22012021123 is 32112021022.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22012021123 - 2¹ = 22012021121 is a prime.

It is a super-2 number, since 2×22012021123² (a number of 21 digits) contains 22 as substring.

Together with 22012021121, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 22012021097 and 22012021106.

It is not a weakly prime, because it can be changed into another prime (22012021121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11006010561 + 11006010562.

It is an arithmetic number, because the mean of its divisors is an integer number (11006010562).

Almost surely, 2^22012021123 is an apocalyptic number.

22012021123 is a deficient number, since it is larger than the sum of its proper divisors (1).

22012021123 is an equidigital number, since it uses as much as digits as its factorization.

22012021123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 22012021123 its reverse (32112021022), we get a palindrome (54124042145).

The spelling of 22012021123 in words is "twenty-two billion, twelve million, twenty-one thousand, one hundred twenty-three".