121242413020 has 24 divisors (see below), whose sum is σ = 258195113568. Its totient is φ = 47813908800.

The previous prime is 121242412997. The next prime is 121242413053. The reversal of 121242413020 is 20314242121.

It is a junction number, because it is equal to n+sod(n) for n = 121242412982 and 121242413000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42689571 + ... + 42692410.

It is an arithmetic number, because the mean of its divisors is an integer number (10758129732).

Almost surely, 2^121242413020 is an apocalyptic number.

121242413020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121242413020 is an abundant number, since it is smaller than the sum of its proper divisors (136952700548).

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

121242413020 is a wasteful number, since it uses less digits than its factorization.

121242413020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85382061 (or 85382059 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 121242413020 its reverse (20314242121), we get a palindrome (141556655141).

The spelling of 121242413020 in words is "one hundred twenty-one billion, two hundred forty-two million, four hundred thirteen thousand, twenty".