121123420 has 36 divisors (see below), whose sum is σ = 279590472. Its totient is φ = 44044000.

The previous prime is 121123399. The next prime is 121123421. The reversal of 121123420 is 24321121.

It is a junction number, because it is equal to n+sod(n) for n = 121123394 and 121123403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121123421) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 22606 + ... + 27445.

It is an arithmetic number, because the mean of its divisors is an integer number (7766402).

Almost surely, 2^121123420 is an apocalyptic number.

121123420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121123420 is an abundant number, since it is smaller than the sum of its proper divisors (158467052).

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

121123420 is a wasteful number, since it uses less digits than its factorization.

121123420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50082 (or 50069 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 121123420 is about 11005.6085701791. The cubic root of 121123420 is about 494.7768541535.

Adding to 121123420 its reverse (24321121), we get a palindrome (145444541).

The spelling of 121123420 in words is "one hundred twenty-one million, one hundred twenty-three thousand, four hundred twenty".