242621100420 has 96 divisors (see below), whose sum is σ = 688200831360. Its totient is φ = 63857587200.

The previous prime is 242621100409. The next prime is 242621100437. The reversal of 242621100420 is 24001126242.

It is a happy number.

It is a super-3 number, since 3×242621100420³ (a number of 35 digits) contains 333 as substring.

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 31 ways as a sum of consecutive naturals, for example, 2966070 + ... + 3046770.

It is an arithmetic number, because the mean of its divisors is an integer number (7168758660).

Almost surely, 2^242621100420 is an apocalyptic number.

242621100420 is a gapful number since it is divisible by the number (20) 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 242621100420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344100415680).

242621100420 is an abundant number, since it is smaller than the sum of its proper divisors (445579730940).

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

242621100420 is a wasteful number, since it uses less digits than its factorization.

242621100420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81365 (or 81363 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 242621100420 its reverse (24001126242), we get a palindrome (266622226662).

The spelling of 242621100420 in words is "two hundred forty-two billion, six hundred twenty-one million, one hundred thousand, four hundred twenty".