131223011100 has 36 divisors (see below), whose sum is σ = 379671912984. Its totient is φ = 34992802880.

The previous prime is 131223011081. The next prime is 131223011123. The reversal of 131223011100 is 1110322131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 131223011100.

It is a congruent number.

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, 218704719 + ... + 218705318.

Almost surely, 2^131223011100 is an apocalyptic number.

131223011100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131223011100 is an abundant number, since it is smaller than the sum of its proper divisors (248448901884).

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

131223011100 is a wasteful number, since it uses less digits than its factorization.

131223011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437410054 (or 437410047 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 131223011100 its reverse (1110322131), we get a palindrome (132333333231).

The spelling of 131223011100 in words is "one hundred thirty-one billion, two hundred twenty-three million, eleven thousand, one hundred".