2101020331 has 4 divisors (see below), whose sum is σ = 2101537000. Its totient is φ = 2100503664.

The previous prime is 2101020203. The next prime is 2101020379. The reversal of 2101020331 is 1330201012.

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 2101020331 - 2⁷ = 2101020203 is a prime.

It is a super-2 number, since 2×2101020331² = 8828572862550699122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101020631) 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, 252186 + ... + 260383.

It is an arithmetic number, because the mean of its divisors is an integer number (525384250).

Almost surely, 2^2101020331 is an apocalyptic number.

2101020331 is a deficient number, since it is larger than the sum of its proper divisors (516669).

2101020331 is an equidigital number, since it uses as much as digits as its factorization.

2101020331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516668.

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

The square root of 2101020331 is about 45836.8883215255. Note that the first 3 decimals coincide. The cubic root of 2101020331 is about 1280.7865305528.

Adding to 2101020331 its reverse (1330201012), we get a palindrome (3431221343).

The spelling of 2101020331 in words is "two billion, one hundred one million, twenty thousand, three hundred thirty-one".