100021011 has 4 divisors (see below), whose sum is σ = 133361352. Its totient is φ = 66680672.

The previous prime is 100021003. The next prime is 100021039. The reversal of 100021011 is 110120001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100021011 - 2³ = 100021003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100021091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16670166 + ... + 16670171.

It is an arithmetic number, because the mean of its divisors is an integer number (33340338).

Almost surely, 2^100021011 is an apocalyptic number.

100021011 is a deficient number, since it is larger than the sum of its proper divisors (33340341).

100021011 is an equidigital number, since it uses as much as digits as its factorization.

100021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33340340.

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 100021011 is about 10001.0504948230. The cubic root of 100021011 is about 464.1913892258.

Adding to 100021011 its reverse (110120001), we get a palindrome (210141012).

The spelling of 100021011 in words is "one hundred million, twenty-one thousand, eleven".