212032320021 has 24 divisors (see below), whose sum is σ = 325930886424. Its totient is φ = 132364538880.

The previous prime is 212032319963. The next prime is 212032320113. The reversal of 212032320021 is 120023230212.

212032320021 is a `hidden beast` number, since 2 + 120 + 323 + 200 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 135089327025 + 76942992996 = 367545^2 + 277386^2 .

It is not a de Polignac number, because 212032320021 - 2⁶ = 212032319957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212032319976 and 212032320003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212032300021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3487200 + ... + 3547481.

It is an arithmetic number, because the mean of its divisors is an integer number (13580453601).

Almost surely, 2^212032320021 is an apocalyptic number.

It is an amenable number.

212032320021 is a deficient number, since it is larger than the sum of its proper divisors (113898566403).

212032320021 is a wasteful number, since it uses less digits than its factorization.

212032320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7034901 (or 7034898 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 212032320021 its reverse (120023230212), we get a palindrome (332055550233).

The spelling of 212032320021 in words is "two hundred twelve billion, thirty-two million, three hundred twenty thousand, twenty-one".