242120220 has 24 divisors (see below), whose sum is σ = 677936784. Its totient is φ = 64565376.

The previous prime is 242120209. The next prime is 242120269. The reversal of 242120220 is 22021242.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 242120220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2017609 + ... + 2017728.

It is an arithmetic number, because the mean of its divisors is an integer number (28247366).

Almost surely, 2^242120220 is an apocalyptic number.

242120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242120220 is an abundant number, since it is smaller than the sum of its proper divisors (435816564).

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

242120220 is a wasteful number, since it uses less digits than its factorization.

242120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4035349 (or 4035347 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 242120220 is about 15560.2127234816. The cubic root of 242120220 is about 623.2711431627.

Adding to 242120220 its reverse (22021242), we get a palindrome (264141462).

The spelling of 242120220 in words is "two hundred forty-two million, one hundred twenty thousand, two hundred twenty".