212021121344 has 14 divisors (see below), whose sum is σ = 420729412794. Its totient is φ = 106010560640.

The previous prime is 212021121343. The next prime is 212021121397. The reversal of 212021121344 is 443121120212.

It can be written as a sum of positive squares in only one way, i.e., 205825542400 + 6195578944 = 453680^2 + 78712^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021121343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1656414947 + ... + 1656415074.

Almost surely, 2^212021121344 is an apocalyptic number.

It is an amenable number.

212021121344 is a deficient number, since it is larger than the sum of its proper divisors (208708291450).

212021121344 is an equidigital number, since it uses as much as digits as its factorization.

212021121344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3312830033 (or 3312830023 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 212021121344 its reverse (443121120212), we get a palindrome (655142241556).

The spelling of 212021121344 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-one thousand, three hundred forty-four".