212021113332 has 96 divisors (see below), whose sum is σ = 598959228672. Its totient is φ = 56984426496.

The previous prime is 212021113321. The next prime is 212021113351. The reversal of 212021113332 is 233311120212.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 212021113299 and 212021113308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2779818 + ... + 2855070.

It is an arithmetic number, because the mean of its divisors is an integer number (6239158632).

Almost surely, 2^212021113332 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 212021113332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299479614336).

212021113332 is an abundant number, since it is smaller than the sum of its proper divisors (386938115340).

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

212021113332 is a wasteful number, since it uses less digits than its factorization.

212021113332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77257 (or 77255 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 212021113332 its reverse (233311120212), we get a palindrome (445332233544).

The spelling of 212021113332 in words is "two hundred twelve billion, twenty-one million, one hundred thirteen thousand, three hundred thirty-two".