123202232221 has 4 divisors (see below), whose sum is σ = 123203832444. Its totient is φ = 123200632000.

The previous prime is 123202232201. The next prime is 123202232249. The reversal of 123202232221 is 122232202321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122232202321 = 20753 ⋅5889857.

It can be written as a sum of positive squares in 2 ways, for example, as 106805429721 + 16396802500 = 326811^2 + 128050^2 .

It is a cyclic number.

It is not a de Polignac number, because 123202232221 - 2⁷ = 123202232093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123202232192 and 123202232201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123202232201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678460 + ... + 840661.

It is an arithmetic number, because the mean of its divisors is an integer number (30800958111).

Almost surely, 2^123202232221 is an apocalyptic number.

It is an amenable number.

123202232221 is a deficient number, since it is larger than the sum of its proper divisors (1600223).

123202232221 is an equidigital number, since it uses as much as digits as its factorization.

123202232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600222.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 123202232221 its reverse (122232202321), we get a palindrome (245434434542).

The spelling of 123202232221 in words is "one hundred twenty-three billion, two hundred two million, two hundred thirty-two thousand, two hundred twenty-one".