100220242 has 4 divisors (see below), whose sum is σ = 150330366. Its totient is φ = 50110120.

The previous prime is 100220233. The next prime is 100220249. The reversal of 100220242 is 242022001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242022001 = 13 ⋅18617077.

It can be written as a sum of positive squares in only one way, i.e., 100220121 + 121 = 10011^2 + 11^2 .

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (100220249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25055059 + ... + 25055062.

Almost surely, 2^100220242 is an apocalyptic number.

100220242 is a deficient number, since it is larger than the sum of its proper divisors (50110124).

100220242 is an equidigital number, since it uses as much as digits as its factorization.

100220242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50110123.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 100220242 is about 10011.0060433505. The cubic root of 100220242 is about 464.4993911058.

Adding to 100220242 its reverse (242022001), we get a palindrome (342242243).

The spelling of 100220242 in words is "one hundred million, two hundred twenty thousand, two hundred forty-two".