121540240212 has 48 divisors (see below), whose sum is σ = 302975447040. Its totient is φ = 37808271072.

The previous prime is 121540240201. The next prime is 121540240229. The reversal of 121540240212 is 212042045121.

121540240212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3962868 + ... + 3993419.

It is an arithmetic number, because the mean of its divisors is an integer number (6311988480).

Almost surely, 2^121540240212 is an apocalyptic number.

121540240212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121540240212 is an abundant number, since it is smaller than the sum of its proper divisors (181435206828).

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

121540240212 is a wasteful number, since it uses less digits than its factorization.

121540240212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7956380 (or 7956378 counting only the distinct ones).

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

Adding to 121540240212 its reverse (212042045121), we get a palindrome (333582285333).

The spelling of 121540240212 in words is "one hundred twenty-one billion, five hundred forty million, two hundred forty thousand, two hundred twelve".