121344420 has 96 divisors (see below), whose sum is σ = 352066176. Its totient is φ = 31206400.

The previous prime is 121344407. The next prime is 121344451. The reversal of 121344420 is 24443121.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262990 + ... + 263450.

It is an arithmetic number, because the mean of its divisors is an integer number (3667356).

Almost surely, 2^121344420 is an apocalyptic number.

121344420 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 121344420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176033088).

121344420 is an abundant number, since it is smaller than the sum of its proper divisors (230721756).

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

121344420 is a wasteful number, since it uses less digits than its factorization.

121344420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 121344420 is about 11015.6443297703. The cubic root of 121344420 is about 495.0775921627.

Adding to 121344420 its reverse (24443121), we get a palindrome (145787541).

The spelling of 121344420 in words is "one hundred twenty-one million, three hundred forty-four thousand, four hundred twenty".