121544202012 has 24 divisors (see below), whose sum is σ = 290520288912. Its totient is φ = 39526569600.

The previous prime is 121544202011. The next prime is 121544202061. The reversal of 121544202012 is 210202445121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121544202011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123520039 + ... + 123521022.

It is an arithmetic number, because the mean of its divisors is an integer number (12105012038).

Almost surely, 2^121544202012 is an apocalyptic number.

121544202012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121544202012 is an abundant number, since it is smaller than the sum of its proper divisors (168976086900).

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

121544202012 is a wasteful number, since it uses less digits than its factorization.

121544202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247041109 (or 247041107 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 121544202012 its reverse (210202445121), we get a palindrome (331746647133).

The spelling of 121544202012 in words is "one hundred twenty-one billion, five hundred forty-four million, two hundred two thousand, twelve".