120242421 has 32 divisors (see below), whose sum is σ = 194741120. Its totient is φ = 72876672.

The previous prime is 120242417. The next prime is 120242443. The reversal of 120242421 is 124242021.

120242421 is a `hidden beast` number, since 1 + 2 + 0 + 242 + 421 = 666.

It is not a de Polignac number, because 120242421 - 2² = 120242417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120242394 and 120242403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120242401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20961 + ... + 26073.

It is an arithmetic number, because the mean of its divisors is an integer number (6085660).

Almost surely, 2^120242421 is an apocalyptic number.

It is an amenable number.

120242421 is a deficient number, since it is larger than the sum of its proper divisors (74498699).

120242421 is a wasteful number, since it uses less digits than its factorization.

120242421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5202 (or 5196 counting only the distinct ones).

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

The square root of 120242421 is about 10965.5105216310. The cubic root of 120242421 is about 493.5743367847.

Adding to 120242421 its reverse (124242021), we get a palindrome (244484442).

The spelling of 120242421 in words is "one hundred twenty million, two hundred forty-two thousand, four hundred twenty-one".