123233210121 has 16 divisors (see below), whose sum is σ = 187933132800. Its totient is φ = 70363029648.

The previous prime is 123233210117. The next prime is 123233210197. The reversal of 123233210121 is 121012332321.

It is not a de Polignac number, because 123233210121 - 2² = 123233210117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (123233210521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2304081 + ... + 2356958.

It is an arithmetic number, because the mean of its divisors is an integer number (11745820800).

Almost surely, 2^123233210121 is an apocalyptic number.

It is an amenable number.

123233210121 is a deficient number, since it is larger than the sum of its proper divisors (64699922679).

123233210121 is a wasteful number, since it uses less digits than its factorization.

123233210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4662308.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 123233210121 its reverse (121012332321), we get a palindrome (244245542442).

The spelling of 123233210121 in words is "one hundred twenty-three billion, two hundred thirty-three million, two hundred ten thousand, one hundred twenty-one".