100142021 has 8 divisors (see below), whose sum is σ = 116060544. Its totient is φ = 84626640.

The previous prime is 100142011. The next prime is 100142047. The reversal of 100142021 is 120241001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100142021 - 2¹⁴ = 100125637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100141993 and 100142011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100142011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100250 + ... + 101243.

It is an arithmetic number, because the mean of its divisors is an integer number (14507568).

Almost surely, 2^100142021 is an apocalyptic number.

It is an amenable number.

100142021 is a deficient number, since it is larger than the sum of its proper divisors (15918523).

100142021 is an equidigital number, since it uses as much as digits as its factorization.

100142021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201571.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 100142021 is about 10007.0985305432. The cubic root of 100142021 is about 464.3785137829.

Adding to 100142021 its reverse (120241001), we get a palindrome (220383022).

The spelling of 100142021 in words is "one hundred million, one hundred forty-two thousand, twenty-one".