1231010100 has 54 divisors (see below), whose sum is σ = 3858535590. Its totient is φ = 328269120.

The previous prime is 1231010059. The next prime is 1231010129. The reversal of 1231010100 is 10101321.

It can be written as a sum of positive squares in 3 ways, for example, as 180472356 + 1050537744 = 13434^2 + 32412^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 682995 + ... + 684794.

Almost surely, 2^1231010100 is an apocalyptic number.

1231010100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231010100 is an abundant number, since it is smaller than the sum of its proper divisors (2627525490).

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

1231010100 is a wasteful number, since it uses less digits than its factorization.

1231010100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367809 (or 1367799 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1231010100 is about 35085.7535190567. The cubic root of 1231010100 is about 1071.7344855995.

Adding to 1231010100 its reverse (10101321), we get a palindrome (1241111421).

The spelling of 1231010100 in words is "one billion, two hundred thirty-one million, ten thousand, one hundred".