212021003331 has 14 divisors (see below), whose sum is σ = 317886087020. Its totient is φ = 141347335068.

The previous prime is 212021003323. The next prime is 212021003353. The reversal of 212021003331 is 133300120212.

212021003331 is a `hidden beast` number, since 2 + 120 + 210 + 0 + 3 + 331 = 666.

It is not a de Polignac number, because 212021003331 - 2³ = 212021003323 is a prime.

It is a super-2 number, since 2×212021003331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212021003321) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 145418341 + ... + 145419798.

Almost surely, 2^212021003331 is an apocalyptic number.

212021003331 is a deficient number, since it is larger than the sum of its proper divisors (105865083689).

212021003331 is an frugal number, since it uses more digits than its factorization.

212021003331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290838157 (or 290838142 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 212021003331 its reverse (133300120212), we get a palindrome (345321123543).

The spelling of 212021003331 in words is "two hundred twelve billion, twenty-one million, three thousand, three hundred thirty-one".