123221230151 has 2 divisors, whose sum is σ = 123221230152. Its totient is φ = 123221230150.

The previous prime is 123221230117. The next prime is 123221230207. The reversal of 123221230151 is 151032122321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123221230151 - 2¹⁸ = 123220968007 is a prime.

It is a super-4 number, since 4×123221230151⁴ (a number of 45 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123221233151) 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, 61610615075 + 61610615076.

It is an arithmetic number, because the mean of its divisors is an integer number (61610615076).

Almost surely, 2^123221230151 is an apocalyptic number.

123221230151 is a deficient number, since it is larger than the sum of its proper divisors (1).

123221230151 is an equidigital number, since it uses as much as digits as its factorization.

123221230151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 123221230151 its reverse (151032122321), we get a palindrome (274253352472).

The spelling of 123221230151 in words is "one hundred twenty-three billion, two hundred twenty-one million, two hundred thirty thousand, one hundred fifty-one".