121340420540 has 12 divisors (see below), whose sum is σ = 254814883176. Its totient is φ = 48536168208.

The previous prime is 121340420533. The next prime is 121340420561. The reversal of 121340420540 is 45024043121.

121340420540 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 3 ways as a sum of consecutive naturals, for example, 3033510494 + ... + 3033510533.

It is an arithmetic number, because the mean of its divisors is an integer number (21234573598).

Almost surely, 2^121340420540 is an apocalyptic number.

121340420540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121340420540 is an abundant number, since it is smaller than the sum of its proper divisors (133474462636).

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

121340420540 is a wasteful number, since it uses less digits than its factorization.

121340420540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6067021036 (or 6067021034 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 121340420540 its reverse (45024043121), we get a palindrome (166364463661).

The spelling of 121340420540 in words is "one hundred twenty-one billion, three hundred forty million, four hundred twenty thousand, five hundred forty".