123265206321 has 16 divisors (see below), whose sum is σ = 165283675200. Its totient is φ = 81712898048.

The previous prime is 123265206269. The next prime is 123265206343. The reversal of 123265206321 is 123602562321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 123265206321 - 2²³ = 123256817713 is a prime.

It is a super-2 number, since 2×123265206321² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123265206221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298210 + ... + 579188.

It is an arithmetic number, because the mean of its divisors is an integer number (10330229700).

Almost surely, 2^123265206321 is an apocalyptic number.

It is an amenable number.

123265206321 is a deficient number, since it is larger than the sum of its proper divisors (42018468879).

123265206321 is a wasteful number, since it uses less digits than its factorization.

123265206321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281808.

The product of its (nonzero) digits is 25920, while the sum is 33.

Adding to 123265206321 its reverse (123602562321), we get a palindrome (246867768642).

The spelling of 123265206321 in words is "one hundred twenty-three billion, two hundred sixty-five million, two hundred six thousand, three hundred twenty-one".