242121442440 has 64 divisors (see below), whose sum is σ = 726397580160. Its totient is φ = 64562762240.

The previous prime is 242121442439. The next prime is 242121442457. The reversal of 242121442440 is 44244121242.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 242121442398 and 242121442407.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4225180 + ... + 4282100.

It is an arithmetic number, because the mean of its divisors is an integer number (11349962190).

Almost surely, 2^242121442440 is an apocalyptic number.

242121442440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242121442440 is an abundant number, since it is smaller than the sum of its proper divisors (484276137720).

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

242121442440 is a wasteful number, since it uses less digits than its factorization.

242121442440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92382 (or 92378 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 30.

Adding to 242121442440 its reverse (44244121242), we get a palindrome (286365563682).

The spelling of 242121442440 in words is "two hundred forty-two billion, one hundred twenty-one million, four hundred forty-two thousand, four hundred forty".