121225420 has 12 divisors (see below), whose sum is σ = 254573424. Its totient is φ = 48490160.

The previous prime is 121225411. The next prime is 121225439. The reversal of 121225420 is 24522121.

121225420 is nontrivially palindromic in base 15.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3030616 + ... + 3030655.

It is an arithmetic number, because the mean of its divisors is an integer number (21214452).

Almost surely, 2^121225420 is an apocalyptic number.

121225420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121225420 is an abundant number, since it is smaller than the sum of its proper divisors (133348004).

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

121225420 is a wasteful number, since it uses less digits than its factorization.

121225420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6061280 (or 6061278 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 121225420 is about 11010.2415958961. The cubic root of 121225420 is about 494.9157017283.

Adding to 121225420 its reverse (24522121), we get a palindrome (145747541).

The spelling of 121225420 in words is "one hundred twenty-one million, two hundred twenty-five thousand, four hundred twenty".