1201431100 has 18 divisors (see below), whose sum is σ = 2607105704. Its totient is φ = 480572400.

The previous prime is 1201431079. The next prime is 1201431103. The reversal of 1201431100 is 11341021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201431103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6007056 + ... + 6007255.

Almost surely, 2^1201431100 is an apocalyptic number.

1201431100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201431100 is an abundant number, since it is smaller than the sum of its proper divisors (1405674604).

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

1201431100 is a wasteful number, since it uses less digits than its factorization.

1201431100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12014325 (or 12014318 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1201431100 is about 34661.6661457582. Note that the first 3 decimals coincide. The cubic root of 1201431100 is about 1063.0808376632.

Adding to 1201431100 its reverse (11341021), we get a palindrome (1212772121).

The spelling of 1201431100 in words is "one billion, two hundred one million, four hundred thirty-one thousand, one hundred".