123221230501 has 2 divisors, whose sum is σ = 123221230502. Its totient is φ = 123221230500.

The previous prime is 123221230459. The next prime is 123221230511. The reversal of 123221230501 is 105032122321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113956205476 + 9265025025 = 337574^2 + 96255^2 .

It is a cyclic number.

It is not a de Polignac number, because 123221230501 - 2²⁵ = 123187676069 is a prime.

It is a super-2 number, since 2×123221230501² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123221230511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61610615250 + 61610615251.

It is an arithmetic number, because the mean of its divisors is an integer number (61610615251).

Almost surely, 2^123221230501 is an apocalyptic number.

It is an amenable number.

123221230501 is a deficient number, since it is larger than the sum of its proper divisors (1).

123221230501 is an equidigital number, since it uses as much as digits as its factorization.

123221230501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 123221230501 its reverse (105032122321), we get a palindrome (228253352822).

The spelling of 123221230501 in words is "one hundred twenty-three billion, two hundred twenty-one million, two hundred thirty thousand, five hundred one".