123223031022 has 128 divisors (see below), whose sum is σ = 307030155264. Its totient is φ = 32101982208.

The previous prime is 123223030967. The next prime is 123223031023. The reversal of 123223031022 is 220130322321.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 123223031022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123223031023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32146018 + ... + 32149850.

It is an arithmetic number, because the mean of its divisors is an integer number (2398673088).

Almost surely, 2^123223031022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123223031022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153515077632).

123223031022 is an abundant number, since it is smaller than the sum of its proper divisors (183807124242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123223031022 is a wasteful number, since it uses less digits than its factorization.

123223031022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4562.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 123223031022 its reverse (220130322321), we get a palindrome (343353353343).

The spelling of 123223031022 in words is "one hundred twenty-three billion, two hundred twenty-three million, thirty-one thousand, twenty-two".