212021322312 has 32 divisors (see below), whose sum is σ = 530206840800. Its totient is φ = 70653302784.

The previous prime is 212021322239. The next prime is 212021322397. The reversal of 212021322312 is 213223120212.

It is a super-2 number, since 2×212021322312² (a number of 23 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 1194762 + ... + 1360697.

It is an arithmetic number, because the mean of its divisors is an integer number (16568963775).

Almost surely, 2^212021322312 is an apocalyptic number.

It is an amenable number.

212021322312 is an abundant number, since it is smaller than the sum of its proper divisors (318185518488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212021322312 is a wasteful number, since it uses less digits than its factorization.

212021322312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558925 (or 2558921 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 212021322312 its reverse (213223120212), we get a palindrome (425244442524).

The spelling of 212021322312 in words is "two hundred twelve billion, twenty-one million, three hundred twenty-two thousand, three hundred twelve".