1223232100 has 72 divisors (see below), whose sum is σ = 2755323648. Its totient is φ = 470870400.

The previous prime is 1223232097. The next prime is 1223232139. The reversal of 1223232100 is 12323221.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 609699 + ... + 611701.

It is an arithmetic number, because the mean of its divisors is an integer number (38268384).

Almost surely, 2^1223232100 is an apocalyptic number.

1223232100 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 1223232100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1377661824).

1223232100 is an abundant number, since it is smaller than the sum of its proper divisors (1532091548).

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

1223232100 is a wasteful number, since it uses less digits than its factorization.

1223232100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245 (or 2238 counting only the distinct ones).

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

The square root of 1223232100 is about 34974.7351669745. The cubic root of 1223232100 is about 1069.4725032624.

Adding to 1223232100 its reverse (12323221), we get a palindrome (1235555321).

The spelling of 1223232100 in words is "one billion, two hundred twenty-three million, two hundred thirty-two thousand, one hundred".