121420784450 has 48 divisors (see below), whose sum is σ = 258251982720. Its totient is φ = 41606421120.

The previous prime is 121420784417. The next prime is 121420784461. The reversal of 121420784450 is 54487024121.

121420784450 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 526766 + ... + 721334.

It is an arithmetic number, because the mean of its divisors is an integer number (5380249640).

Almost surely, 2^121420784450 is an apocalyptic number.

121420784450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121420784450 is an abundant number, since it is smaller than the sum of its proper divisors (136831198270).

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

121420784450 is a wasteful number, since it uses less digits than its factorization.

121420784450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196371 (or 196366 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 38.

The spelling of 121420784450 in words is "one hundred twenty-one billion, four hundred twenty million, seven hundred eighty-four thousand, four hundred fifty".