100402101 has 6 divisors (see below), whose sum is σ = 145025270. Its totient is φ = 66934728.

The previous prime is 100402079. The next prime is 100402111. The reversal of 100402101 is 101204001.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 81270225 + 19131876 = 9015^2 + 4374^2 .

It is not a de Polignac number, because 100402101 - 2⁵ = 100402069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 11155789 = 100402101 / (1 + 0 + 0 + 4 + 0 + 2 + 1 + 0 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100402111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5577886 + ... + 5577903.

Almost surely, 2^100402101 is an apocalyptic number.

It is an amenable number.

100402101 is a deficient number, since it is larger than the sum of its proper divisors (44623169).

100402101 is a wasteful number, since it uses less digits than its factorization.

100402101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11155795 (or 11155792 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 100402101 is about 10020.0848798800. The cubic root of 100402101 is about 464.7801805270.

Adding to 100402101 its reverse (101204001), we get a palindrome (201606102).

The spelling of 100402101 in words is "one hundred million, four hundred two thousand, one hundred one".