212021221332 has 24 divisors (see below), whose sum is σ = 494748683296. Its totient is φ = 70669097568.

The previous prime is 212021221301. The next prime is 212021221337. The reversal of 212021221332 is 233122120212.

It is a super-2 number, since 2×212021221332² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212021221299 and 212021221308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021221337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387523 + ... + 757770.

Almost surely, 2^212021221332 is an apocalyptic number.

It is an amenable number.

212021221332 is an abundant number, since it is smaller than the sum of its proper divisors (282727461964).

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

212021221332 is a wasteful number, since it uses less digits than its factorization.

212021221332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160727 (or 1160725 counting only the distinct ones).

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

Adding to 212021221332 its reverse (233122120212), we get a palindrome (445143341544).

The spelling of 212021221332 in words is "two hundred twelve billion, twenty-one million, two hundred twenty-one thousand, three hundred thirty-two".