21122123027 has 2 divisors, whose sum is σ = 21122123028. Its totient is φ = 21122123026.

The previous prime is 21122123021. The next prime is 21122123039. The reversal of 21122123027 is 72032122112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21122123027 - 2⁶ = 21122122963 is a prime.

It is a super-2 number, since 2×21122123027² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122122993 and 21122123011.

It is not a weakly prime, because it can be changed into another prime (21122123021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561061513 + 10561061514.

It is an arithmetic number, because the mean of its divisors is an integer number (10561061514).

Almost surely, 2^21122123027 is an apocalyptic number.

21122123027 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122123027 is an equidigital number, since it uses as much as digits as its factorization.

21122123027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 21122123027 its reverse (72032122112), we get a palindrome (93154245139).

The spelling of 21122123027 in words is "twenty-one billion, one hundred twenty-two million, one hundred twenty-three thousand, twenty-seven".