2101031 has 4 divisors (see below), whose sum is σ = 2105712. Its totient is φ = 2096352.

The previous prime is 2101019. The next prime is 2101051. The reversal of 2101031 is 1301012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101031 is a prime.

It is a super-2 number, since 2×2101031² = 8828662525922, 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 (2101051) 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, 1586 + ... + 2591.

It is an arithmetic number, because the mean of its divisors is an integer number (526428).

2^2101031 is an apocalyptic number.

2101031 is a deficient number, since it is larger than the sum of its proper divisors (4681).

2101031 is an equidigital number, since it uses as much as digits as its factorization.

2101031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4680.

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

The square root of 2101031 is about 1449.4933597640. The cubic root of 2101031 is about 128.0788698498.

Adding to 2101031 its reverse (1301012), we get a palindrome (3402043).

The spelling of 2101031 in words is "two million, one hundred one thousand, thirty-one".