1230221100 has 36 divisors (see below), whose sum is σ = 3559440584. Its totient is φ = 328058880.

The previous prime is 1230221077. The next prime is 1230221119. The reversal of 1230221100 is 11220321.

1230221100 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2050069 + ... + 2050668.

Almost surely, 2^1230221100 is an apocalyptic number.

1230221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1230221100 is an abundant number, since it is smaller than the sum of its proper divisors (2329219484).

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

1230221100 is a wasteful number, since it uses less digits than its factorization.

1230221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4100754 (or 4100747 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1230221100 is about 35074.5078368892. The cubic root of 1230221100 is about 1071.5054652115.

Adding to 1230221100 its reverse (11220321), we get a palindrome (1241441421).

It can be divided in two parts, 1230221 and 100, that added together give a palindrome (1230321).

The spelling of 1230221100 in words is "one billion, two hundred thirty million, two hundred twenty-one thousand, one hundred".