100021031 has 8 divisors (see below), whose sum is σ = 110496000. Its totient is φ = 89776440.

The previous prime is 100021003. The next prime is 100021039. The reversal of 100021031 is 130120001.

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

It is a cyclic number.

It is not a de Polignac number, because 100021031 - 2¹⁴ = 100004647 is a prime.

It is a super-2 number, since 2×100021031² = 20008413284605922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021039) 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, 56681 + ... + 58418.

It is an arithmetic number, because the mean of its divisors is an integer number (13812000).

Almost surely, 2^100021031 is an apocalyptic number.

100021031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

100021031 is a deficient number, since it is larger than the sum of its proper divisors (10474969).

100021031 is a wasteful number, since it uses less digits than its factorization.

100021031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115189.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 100021031 is about 10001.0514947179. The cubic root of 100021031 is about 464.1914201654.

Adding to 100021031 its reverse (130120001), we get a palindrome (230141032).

The spelling of 100021031 in words is "one hundred million, twenty-one thousand, thirty-one".