1223101220 has 48 divisors (see below), whose sum is σ = 2809598400. Its totient is φ = 443560320.

The previous prime is 1223101219. The next prime is 1223101241. The reversal of 1223101220 is 221013221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1223101195 and 1223101204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76046 + ... + 90714.

It is an arithmetic number, because the mean of its divisors is an integer number (58533300).

Almost surely, 2^1223101220 is an apocalyptic number.

1223101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223101220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1404799200).

1223101220 is an abundant number, since it is smaller than the sum of its proper divisors (1586497180).

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

1223101220 is a wasteful number, since it uses less digits than its factorization.

1223101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15068 (or 15066 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1223101220 is about 34972.8640520047. The cubic root of 1223101220 is about 1069.4343590831.

Adding to 1223101220 its reverse (221013221), we get a palindrome (1444114441).

The spelling of 1223101220 in words is "one billion, two hundred twenty-three million, one hundred one thousand, two hundred twenty".