1223132020 has 24 divisors (see below), whose sum is σ = 2802084768. Its totient is φ = 444775200.

The previous prime is 1223132017. The next prime is 1223132021. The reversal of 1223132020 is 202313221.

It is a junction number, because it is equal to n+sod(n) for n = 1223131985 and 1223132003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223132021) 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, 2779626 + ... + 2780065.

It is an arithmetic number, because the mean of its divisors is an integer number (116753532).

Almost surely, 2^1223132020 is an apocalyptic number.

1223132020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223132020 is an abundant number, since it is smaller than the sum of its proper divisors (1578952748).

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

1223132020 is a wasteful number, since it uses less digits than its factorization.

1223132020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5559711 (or 5559709 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1223132020 is about 34973.3043906349. The cubic root of 1223132020 is about 1069.4433358004.

Adding to 1223132020 its reverse (202313221), we get a palindrome (1425445241).

The spelling of 1223132020 in words is "one billion, two hundred twenty-three million, one hundred thirty-two thousand, twenty".