100020331 has 2 divisors, whose sum is σ = 100020332. Its totient is φ = 100020330.

The previous prime is 100020269. The next prime is 100020337. The reversal of 100020331 is 133020001.

It is a strong prime.

It is an emirp because it is prime and its reverse (133020001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100020331 is a prime.

It is a super-2 number, since 2×100020331² = 20008133226699122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100020337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010165 + 50010166.

It is an arithmetic number, because the mean of its divisors is an integer number (50010166).

Almost surely, 2^100020331 is an apocalyptic number.

100020331 is a deficient number, since it is larger than the sum of its proper divisors (1).

100020331 is an equidigital number, since it uses as much as digits as its factorization.

100020331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 100020331 is about 10001.0164983366. The cubic root of 100020331 is about 464.1903372773.

Adding to 100020331 its reverse (133020001), we get a palindrome (233040332).

The spelling of 100020331 in words is "one hundred million, twenty thousand, three hundred thirty-one".