121040646612 has 96 divisors (see below), whose sum is σ = 314909844480. Its totient is φ = 35960163840.

The previous prime is 121040646583. The next prime is 121040646619. The reversal of 121040646612 is 216646040121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121040646619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12673623 + ... + 12683169.

It is an arithmetic number, because the mean of its divisors is an integer number (3280310880).

Almost surely, 2^121040646612 is an apocalyptic number.

121040646612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121040646612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157454922240).

121040646612 is an abundant number, since it is smaller than the sum of its proper divisors (193869197868).

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

121040646612 is a wasteful number, since it uses less digits than its factorization.

121040646612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12861 (or 12859 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

Adding to 121040646612 its reverse (216646040121), we get a palindrome (337686686733).

The spelling of 121040646612 in words is "one hundred twenty-one billion, forty million, six hundred forty-six thousand, six hundred twelve".