212121013316 has 12 divisors (see below), whose sum is σ = 371216413932. Its totient is φ = 106059180768.

The previous prime is 212121013301. The next prime is 212121013337. The reversal of 212121013316 is 613310121212.

It can be written as a sum of positive squares in 2 ways, for example, as 142189326400 + 69931686916 = 377080^2 + 264446^2 .

It is a super-3 number, since 3×212121013316³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212121013291 and 212121013300.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 87266 + ... + 657158.

It is an arithmetic number, because the mean of its divisors is an integer number (30934701161).

Almost surely, 2^212121013316 is an apocalyptic number.

It is an amenable number.

212121013316 is a deficient number, since it is larger than the sum of its proper divisors (159095400616).

212121013316 is a wasteful number, since it uses less digits than its factorization.

212121013316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662950 (or 662948 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 212121013316 its reverse (613310121212), we get a palindrome (825431134528).

The spelling of 212121013316 in words is "two hundred twelve billion, one hundred twenty-one million, thirteen thousand, three hundred sixteen".