212021121332 has 12 divisors (see below), whose sum is σ = 374862086340. Its totient is φ = 104917668096.

The previous prime is 212021121331. The next prime is 212021121343. The reversal of 212021121332 is 233121120212.

It can be written as a sum of positive squares in 2 ways, for example, as 107462018596 + 104559102736 = 327814^2 + 323356^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021121331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273222707 + ... + 273223482.

It is an arithmetic number, because the mean of its divisors is an integer number (31238507195).

Almost surely, 2^212021121332 is an apocalyptic number.

It is an amenable number.

212021121332 is a deficient number, since it is larger than the sum of its proper divisors (162840965008).

212021121332 is a wasteful number, since it uses less digits than its factorization.

212021121332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546446290 (or 546446288 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212021121332 its reverse (233121120212), we get a palindrome (445142241544).

The spelling of 212021121332 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-one thousand, three hundred thirty-two".