2102130031 has 4 divisors (see below), whose sum is σ = 2102432112. Its totient is φ = 2101827952.

The previous prime is 2102130029. The next prime is 2102130077. The reversal of 2102130031 is 1300312012.

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

It is a cyclic number.

It is not a de Polignac number, because 2102130031 - 2¹ = 2102130029 is a prime.

It is a super-2 number, since 2×2102130031² = 8837901334464121922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102129993 and 2102130020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102130091) 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, 140350 + ... + 154603.

It is an arithmetic number, because the mean of its divisors is an integer number (525608028).

Almost surely, 2^2102130031 is an apocalyptic number.

2102130031 is a deficient number, since it is larger than the sum of its proper divisors (302081).

2102130031 is an equidigital number, since it uses as much as digits as its factorization.

2102130031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302080.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 2102130031 is about 45848.9916028695. The cubic root of 2102130031 is about 1281.0119827037.

Adding to 2102130031 its reverse (1300312012), we get a palindrome (3402442043).

The spelling of 2102130031 in words is "two billion, one hundred two million, one hundred thirty thousand, thirty-one".