212121030331 has 24 divisors (see below), whose sum is σ = 253902496320. Its totient is φ = 176597264592.

The previous prime is 212121030313. The next prime is 212121030349. The reversal of 212121030331 is 133030121212.

It is an interprime number because it is at equal distance from previous prime (212121030313) and next prime (212121030349).

It is not a de Polignac number, because 212121030331 - 2³³ = 203531095739 is a prime.

It is a super-3 number, since 3×212121030331³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212121030299 and 212121030308.

It is not an unprimeable number, because it can be changed into a prime (212121010331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95940 + ... + 658366.

It is an arithmetic number, because the mean of its divisors is an integer number (10579270680).

Almost surely, 2^212121030331 is an apocalyptic number.

212121030331 is a deficient number, since it is larger than the sum of its proper divisors (41781465989).

212121030331 is a wasteful number, since it uses less digits than its factorization.

212121030331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562663 (or 562656 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 212121030331 its reverse (133030121212), we get a palindrome (345151151543).

The spelling of 212121030331 in words is "two hundred twelve billion, one hundred twenty-one million, thirty thousand, three hundred thirty-one".