121044420 has 144 divisors (see below), whose sum is σ = 444382848. Its totient is φ = 26035200.

The previous prime is 121044409. The next prime is 121044431. The reversal of 121044420 is 24440121.

It is an interprime number because it is at equal distance from previous prime (121044409) and next prime (121044431).

It is a super-2 number, since 2×121044420² = 29303503226272800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 121044393 and 121044402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18595 + ... + 24245.

It is an arithmetic number, because the mean of its divisors is an integer number (3085992).

Almost surely, 2^121044420 is an apocalyptic number.

121044420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121044420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222191424).

121044420 is an abundant number, since it is smaller than the sum of its proper divisors (323338428).

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

121044420 is a wasteful number, since it uses less digits than its factorization.

121044420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5690 (or 5685 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 121044420 is about 11002.0189056373. The cubic root of 121044420 is about 494.6692617697.

Adding to 121044420 its reverse (24440121), we get a palindrome (145484541).

The spelling of 121044420 in words is "one hundred twenty-one million, forty-four thousand, four hundred twenty".