1223252100 has 108 divisors (see below), whose sum is σ = 4381983424. Its totient is φ = 279599040.

The previous prime is 1223252087. The next prime is 1223252143. The reversal of 1223252100 is 12523221.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 90784 + ... + 103383.

Almost surely, 2^1223252100 is an apocalyptic number.

1223252100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223252100 is an abundant number, since it is smaller than the sum of its proper divisors (3158731324).

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

1223252100 is a wasteful number, since it uses less digits than its factorization.

1223252100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194194 (or 194184 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1223252100 is about 34975.0210864840. The cubic root of 1223252100 is about 1069.4783319010.

Adding to 1223252100 its reverse (12523221), we get a palindrome (1235775321).

The spelling of 1223252100 in words is "one billion, two hundred twenty-three million, two hundred fifty-two thousand, one hundred".