121243030420 has 48 divisors (see below), whose sum is σ = 263890907280. Its totient is φ = 46753542144.

The previous prime is 121243030417. The next prime is 121243030459. The reversal of 121243030420 is 24030342121.

121243030420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 22014250384 + 99228780036 = 148372^2 + 315006^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121243030391 and 121243030400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 670909 + ... + 832228.

It is an arithmetic number, because the mean of its divisors is an integer number (5497727235).

Almost surely, 2^121243030420 is an apocalyptic number.

121243030420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121243030420 is an abundant number, since it is smaller than the sum of its proper divisors (142647876860).

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

121243030420 is a wasteful number, since it uses less digits than its factorization.

121243030420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503292 (or 1503290 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 121243030420 its reverse (24030342121), we get a palindrome (145273372541).

The spelling of 121243030420 in words is "one hundred twenty-one billion, two hundred forty-three million, thirty thousand, four hundred twenty".