123210421027 has 2 divisors, whose sum is σ = 123210421028. Its totient is φ = 123210421026.

The previous prime is 123210421013. The next prime is 123210421063. The reversal of 123210421027 is 720124012321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123210421027 - 2³⁵ = 88850682659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123210420992 and 123210421010.

It is not a weakly prime, because it can be changed into another prime (123210421427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61605210513 + 61605210514.

It is an arithmetic number, because the mean of its divisors is an integer number (61605210514).

Almost surely, 2^123210421027 is an apocalyptic number.

123210421027 is a deficient number, since it is larger than the sum of its proper divisors (1).

123210421027 is an equidigital number, since it uses as much as digits as its factorization.

123210421027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 123210421027 its reverse (720124012321), we get a palindrome (843334433348).

The spelling of 123210421027 in words is "one hundred twenty-three billion, two hundred ten million, four hundred twenty-one thousand, twenty-seven".