1223030100 has 72 divisors (see below), whose sum is σ = 3542308000. Its totient is φ = 325802880.

The previous prime is 1223030093. The next prime is 1223030111. The reversal of 1223030100 is 10303221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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, 443526 + ... + 446274.

Almost surely, 2^1223030100 is an apocalyptic number.

1223030100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223030100 is an abundant number, since it is smaller than the sum of its proper divisors (2319277900).

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

1223030100 is a wasteful number, since it uses less digits than its factorization.

1223030100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249 (or 4242 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1223030100 is about 34971.8472488944. The cubic root of 1223030100 is about 1069.4136304509.

Adding to 1223030100 its reverse (10303221), we get a palindrome (1233333321).

The spelling of 1223030100 in words is "one billion, two hundred twenty-three million, thirty thousand, one hundred".