20031101 has 2 divisors, whose sum is σ = 20031102. Its totient is φ = 20031100.

The previous prime is 20031059. The next prime is 20031103. The reversal of 20031101 is 10113002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20025625 + 5476 = 4475^2 + 74^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20031101 is a prime.

Together with 20031103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20031103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10015550 + 10015551.

It is an arithmetic number, because the mean of its divisors is an integer number (10015551).

Almost surely, 2^20031101 is an apocalyptic number.

It is an amenable number.

20031101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20031101 is an equidigital number, since it uses as much as digits as its factorization.

20031101 is an evil number, because the sum of its binary digits is even.

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

The square root of 20031101 is about 4475.6118017540. The cubic root of 20031101 is about 271.5823906268.

Adding to 20031101 its reverse (10113002), we get a palindrome (30144103).

The spelling of 20031101 in words is "twenty million, thirty-one thousand, one hundred one".