123221231031 has 8 divisors (see below), whose sum is σ = 172942078720. Its totient is φ = 77823935352.

The previous prime is 123221230973. The next prime is 123221231123. The reversal of 123221231031 is 130132122321.

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

It is not a de Polignac number, because 123221231031 - 2⁶ = 123221230967 is a prime.

It is a super-2 number, since 2×123221231031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123221230989 and 123221231007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123221231131) 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, 1080887935 + ... + 1080888048.

It is an arithmetic number, because the mean of its divisors is an integer number (21617759840).

Almost surely, 2^123221231031 is an apocalyptic number.

123221231031 is a deficient number, since it is larger than the sum of its proper divisors (49720847689).

123221231031 is a wasteful number, since it uses less digits than its factorization.

123221231031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2161776005.

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

Adding to 123221231031 its reverse (130132122321), we get a palindrome (253353353352).

The spelling of 123221231031 in words is "one hundred twenty-three billion, two hundred twenty-one million, two hundred thirty-one thousand, thirty-one".