100421001015 has 16 divisors (see below), whose sum is σ = 160682320896. Its totient is φ = 53554960800.

The previous prime is 100421001013. The next prime is 100421001029. The reversal of 100421001015 is 510100124001.

It is a happy number.

It is not a de Polignac number, because 100421001015 - 2¹ = 100421001013 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 100421000985 and 100421001003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100421001013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120150 + ... + 463980.

It is an arithmetic number, because the mean of its divisors is an integer number (10042645056).

Almost surely, 2^100421001015 is an apocalyptic number.

100421001015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

100421001015 is a deficient number, since it is larger than the sum of its proper divisors (60261319881).

100421001015 is a wasteful number, since it uses less digits than its factorization.

100421001015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363310.

The product of its (nonzero) digits is 40, while the sum is 15.

Adding to 100421001015 its reverse (510100124001), we get a palindrome (610521125016).

The spelling of 100421001015 in words is "one hundred billion, four hundred twenty-one million, one thousand, fifteen".