2121010331 has 6 divisors (see below), whose sum is σ = 2331358596. Its totient is φ = 1928191100.

The previous prime is 2121010327. The next prime is 2121010361. The reversal of 2121010331 is 1330101212.

It is not a de Polignac number, because 2121010331 - 2² = 2121010327 is a prime.

It is a super-2 number, since 2×2121010331² = 8997369648417459122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121010301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8764385 + ... + 8764626.

It is an arithmetic number, because the mean of its divisors is an integer number (388559766).

Almost surely, 2^2121010331 is an apocalyptic number.

2121010331 is a deficient number, since it is larger than the sum of its proper divisors (210348265).

2121010331 is a wasteful number, since it uses less digits than its factorization.

2121010331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17529033 (or 17529022 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 2121010331 is about 46054.4279195823. The cubic root of 2121010331 is about 1284.8356981308.

Adding to 2121010331 its reverse (1330101212), we get a palindrome (3451111543).

The spelling of 2121010331 in words is "two billion, one hundred twenty-one million, ten thousand, three hundred thirty-one".