100218115078 has 4 divisors (see below), whose sum is σ = 150327172620. Its totient is φ = 50109057538.

The previous prime is 100218115031. The next prime is 100218115079. The reversal of 100218115078 is 870511812001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 870511812001 = 13 ⋅66962447077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100218115079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25054528768 + ... + 25054528771.

It is an arithmetic number, because the mean of its divisors is an integer number (37581793155).

Almost surely, 2^100218115078 is an apocalyptic number.

100218115078 is a deficient number, since it is larger than the sum of its proper divisors (50109057542).

100218115078 is an equidigital number, since it uses as much as digits as its factorization.

100218115078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50109057541.

The product of its (nonzero) digits is 4480, while the sum is 34.

Adding to 100218115078 its reverse (870511812001), we get a palindrome (970729927079).

It can be divided in two parts, 100218 and 115078, that added together give a square (215296 = 464²).

The spelling of 100218115078 in words is "one hundred billion, two hundred eighteen million, one hundred fifteen thousand, seventy-eight".