123201211321 has 4 divisors (see below), whose sum is σ = 125525762532. Its totient is φ = 120876660112.

The previous prime is 123201211303. The next prime is 123201211363. The reversal of 123201211321 is 123112102321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59526240400 + 63674970921 = 243980^2 + 252339^2 .

It is a cyclic number.

It is not a de Polignac number, because 123201211321 - 2¹⁵ = 123201178553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123201211381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1162275526 + ... + 1162275631.

It is an arithmetic number, because the mean of its divisors is an integer number (31381440633).

Almost surely, 2^123201211321 is an apocalyptic number.

It is an amenable number.

123201211321 is a deficient number, since it is larger than the sum of its proper divisors (2324551211).

123201211321 is an equidigital number, since it uses as much as digits as its factorization.

123201211321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324551210.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 123201211321 its reverse (123112102321), we get a palindrome (246313313642).

The spelling of 123201211321 in words is "one hundred twenty-three billion, two hundred one million, two hundred eleven thousand, three hundred twenty-one".