100050021 has 6 divisors (see below), whose sum is σ = 144516710. Its totient is φ = 66700008.

The previous prime is 100050019. The next prime is 100050031. The reversal of 100050021 is 120050001.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 94361796 + 5688225 = 9714^2 + 2385^2 .

It is not a de Polignac number, because 100050021 - 2¹ = 100050019 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: 11116669 = 100050021 / (1 + 0 + 0 + 0 + 5 + 0 + 0 + 2 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100049985 and 100050012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100050001) 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, 5558326 + ... + 5558343.

Almost surely, 2^100050021 is an apocalyptic number.

It is an amenable number.

100050021 is a deficient number, since it is larger than the sum of its proper divisors (44466689).

100050021 is a wasteful number, since it uses less digits than its factorization.

100050021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11116675 (or 11116672 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 100050021 is about 10002.5007373156. The cubic root of 100050021 is about 464.2362627657.

The spelling of 100050021 in words is "one hundred million, fifty thousand, twenty-one".