123233122221 has 16 divisors (see below), whose sum is σ = 179452607808. Its totient is φ = 74601561600.

The previous prime is 123233122183. The next prime is 123233122241. The reversal of 123233122221 is 122221332321.

It is not a de Polignac number, because 123233122221 - 2⁹ = 123233121709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123233122191 and 123233122200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123233122241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2100100 + ... + 2157981.

It is an arithmetic number, because the mean of its divisors is an integer number (11215787988).

Almost surely, 2^123233122221 is an apocalyptic number.

123233122221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123233122221 is a deficient number, since it is larger than the sum of its proper divisors (56219485587).

123233122221 is a wasteful number, since it uses less digits than its factorization.

123233122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4258972.

The product of its digits is 1728, while the sum is 24.

Adding to 123233122221 its reverse (122221332321), we get a palindrome (245454454542).

The spelling of 123233122221 in words is "one hundred twenty-three billion, two hundred thirty-three million, one hundred twenty-two thousand, two hundred twenty-one".