242121020 has 24 divisors (see below), whose sum is σ = 509977104. Its totient is φ = 96558336.

The previous prime is 242121001. The next prime is 242121041. The reversal of 242121020 is 20121242.

It is a junction number, because it is equal to n+sod(n) for n = 242120986 and 242121004.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 11222 + ... + 24701.

It is an arithmetic number, because the mean of its divisors is an integer number (21249046).

Almost surely, 2^242121020 is an apocalyptic number.

242121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242121020 is an abundant number, since it is smaller than the sum of its proper divisors (267856084).

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

242121020 is a wasteful number, since it uses less digits than its factorization.

242121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36269 (or 36267 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 242121020 is about 15560.2384300498. The cubic root of 242121020 is about 623.2718296211.

Adding to 242121020 its reverse (20121242), we get a palindrome (262242262).

The spelling of 242121020 in words is "two hundred forty-two million, one hundred twenty-one thousand, twenty".