2102011031 has 4 divisors (see below), whose sum is σ = 2174494200. Its totient is φ = 2029527864.

The previous prime is 2102011013. The next prime is 2102011039. The reversal of 2102011031 is 1301102012.

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-2102011031 is a prime.

It is a super-2 number, since 2×2102011031² = 8836900748891365922, 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 (2102011039) 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, 36241541 + ... + 36241598.

It is an arithmetic number, because the mean of its divisors is an integer number (543623550).

Almost surely, 2^2102011031 is an apocalyptic number.

2102011031 is a deficient number, since it is larger than the sum of its proper divisors (72483169).

2102011031 is an equidigital number, since it uses as much as digits as its factorization.

2102011031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72483168.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2102011031 is about 45847.6938460377. The cubic root of 2102011031 is about 1280.9878098726.

Adding to 2102011031 its reverse (1301102012), we get a palindrome (3403113043).

The spelling of 2102011031 in words is "two billion, one hundred two million, eleven thousand, thirty-one".