131121031100 has 72 divisors (see below), whose sum is σ = 304418276400. Its totient is φ = 48873369600.

The previous prime is 131121031099. The next prime is 131121031103. The reversal of 131121031100 is 1130121131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131121031103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 449765 + ... + 681564.

Almost surely, 2^131121031100 is an apocalyptic number.

131121031100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131121031100 is an abundant number, since it is smaller than the sum of its proper divisors (173297245300).

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

131121031100 is a wasteful number, since it uses less digits than its factorization.

131121031100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131423 (or 1131416 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 131121031100 its reverse (1130121131), we get a palindrome (132251152231).

It can be divided in two parts, 131121031 and 100, that added together give a palindrome (131121131).

The spelling of 131121031100 in words is "one hundred thirty-one billion, one hundred twenty-one million, thirty-one thousand, one hundred".