123331231221 has 8 divisors (see below), whose sum is σ = 179390881824. Its totient is φ = 74746200720.

The previous prime is 123331231211. The next prime is 123331231273. The reversal of 123331231221 is 122132133321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123331231221 - 2⁶ = 123331231157 is a prime.

It is a super-3 number, since 3×123331231221³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123331231191 and 123331231200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123331231211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1868654986 + ... + 1868655051.

It is an arithmetic number, because the mean of its divisors is an integer number (22423860228).

Almost surely, 2^123331231221 is an apocalyptic number.

123331231221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123331231221 is a deficient number, since it is larger than the sum of its proper divisors (56059650603).

123331231221 is a wasteful number, since it uses less digits than its factorization.

123331231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3737310051.

The product of its digits is 1296, while the sum is 24.

Adding to 123331231221 its reverse (122132133321), we get a palindrome (245463364542).

The spelling of 123331231221 in words is "one hundred twenty-three billion, three hundred thirty-one million, two hundred thirty-one thousand, two hundred twenty-one".