121100131812 has 48 divisors (see below), whose sum is σ = 324478828800. Its totient is φ = 34765587360.

The previous prime is 121100131781. The next prime is 121100131837. The reversal of 121100131812 is 218131001121.

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 15 ways as a sum of consecutive naturals, for example, 24140262 + ... + 24145277.

It is an arithmetic number, because the mean of its divisors is an integer number (6759975600).

Almost surely, 2^121100131812 is an apocalyptic number.

121100131812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121100131812 is an abundant number, since it is smaller than the sum of its proper divisors (203378696988).

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

121100131812 is a wasteful number, since it uses less digits than its factorization.

121100131812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48285576 (or 48285574 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 21.

Adding to 121100131812 its reverse (218131001121), we get a palindrome (339231132933).

The spelling of 121100131812 in words is "one hundred twenty-one billion, one hundred million, one hundred thirty-one thousand, eight hundred twelve".