121240243413 has 24 divisors (see below), whose sum is σ = 184053629760. Its totient is φ = 76756394880.

The previous prime is 121240243373. The next prime is 121240243429. The reversal of 121240243413 is 314342042121.

121240243413 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 4 + 0 + 243 + 413 = 666.

It is not a de Polignac number, because 121240243413 - 2¹⁴ = 121240227029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121240243463) 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, 2078068 + ... + 2135613.

It is an arithmetic number, because the mean of its divisors is an integer number (7668901240).

Almost surely, 2^121240243413 is an apocalyptic number.

It is an amenable number.

121240243413 is a deficient number, since it is larger than the sum of its proper divisors (62813386347).

121240243413 is a wasteful number, since it uses less digits than its factorization.

121240243413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4213849 (or 4213846 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 121240243413 its reverse (314342042121), we get a palindrome (435582285534).

The spelling of 121240243413 in words is "one hundred twenty-one billion, two hundred forty million, two hundred forty-three thousand, four hundred thirteen".