121110420 has 24 divisors (see below), whose sum is σ = 339109344. Its totient is φ = 32296096.

The previous prime is 121110419. The next prime is 121110439. The reversal of 121110420 is 24011121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121110396 and 121110405.

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 7 ways as a sum of consecutive naturals, for example, 1009194 + ... + 1009313.

It is an arithmetic number, because the mean of its divisors is an integer number (14129556).

Almost surely, 2^121110420 is an apocalyptic number.

121110420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121110420 is an abundant number, since it is smaller than the sum of its proper divisors (217998924).

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

121110420 is a wasteful number, since it uses less digits than its factorization.

121110420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018519 (or 2018517 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 121110420 is about 11005.0179463734. The cubic root of 121110420 is about 494.7591522942.

Adding to 121110420 its reverse (24011121), we get a palindrome (145121541).

The spelling of 121110420 in words is "one hundred twenty-one million, one hundred ten thousand, four hundred twenty".