2101001031 has 16 divisors (see below), whose sum is σ = 3115756000. Its totient is φ = 1399244544.

The previous prime is 2101001029. The next prime is 2101001041. The reversal of 2101001031 is 1301001012.

It is not a de Polignac number, because 2101001031 - 2¹ = 2101001029 is a prime.

It is a super-2 number, since 2×2101001031² = 8828410664526125922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101001041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12106 + ... + 65943.

It is an arithmetic number, because the mean of its divisors is an integer number (194734750).

Almost surely, 2^2101001031 is an apocalyptic number.

2101001031 is a deficient number, since it is larger than the sum of its proper divisors (1014754969).

2101001031 is an equidigital number, since it uses as much as digits as its factorization.

2101001031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79055 (or 79049 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 2101001031 is about 45836.6777919168. The cubic root of 2101001031 is about 1280.7826087669.

Adding to 2101001031 its reverse (1301001012), we get a palindrome (3402002043).

The spelling of 2101001031 in words is "two billion, one hundred one million, one thousand, thirty-one".