1203231100 has 144 divisors (see below), whose sum is σ = 2888627616. Its totient is φ = 433152000.

The previous prime is 1203231097. The next prime is 1203231101. The reversal of 1203231100 is 11323021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203231101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4251559 + ... + 4251841.

It is an arithmetic number, because the mean of its divisors is an integer number (20059914).

Almost surely, 2^1203231100 is an apocalyptic number.

1203231100 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 1203231100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1444313808).

1203231100 is an abundant number, since it is smaller than the sum of its proper divisors (1685396516).

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

1203231100 is a wasteful number, since it uses less digits than its factorization.

1203231100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1203231100 is about 34687.6217114982. The cubic root of 1203231100 is about 1063.6114800139.

Adding to 1203231100 its reverse (11323021), we get a palindrome (1214554121).

The spelling of 1203231100 in words is "one billion, two hundred three million, two hundred thirty-one thousand, one hundred".