212021102132 has 60 divisors (see below), whose sum is σ = 433691703396. Its totient is φ = 90689639040.

The previous prime is 212021102131. The next prime is 212021102141. The reversal of 212021102132 is 231201120212.

It can be written as a sum of positive squares in 2 ways, for example, as 32621416996 + 179399685136 = 180614^2 + 423556^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212021102132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021102131) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4982498 + ... + 5024870.

Almost surely, 2^212021102132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212021102132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216845851698).

212021102132 is an abundant number, since it is smaller than the sum of its proper divisors (221670601264).

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

212021102132 is an equidigital number, since it uses as much as digits as its factorization.

212021102132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42926 (or 42903 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 212021102132 its reverse (231201120212), we get a palindrome (443222222344).

The spelling of 212021102132 in words is "two hundred twelve billion, twenty-one million, one hundred two thousand, one hundred thirty-two".