212030120221 has 16 divisors (see below), whose sum is σ = 226773591408. Its totient is φ = 197539840000.

The previous prime is 212030120213. The next prime is 212030120321. The reversal of 212030120221 is 122021030212.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1336268025 + 210693852196 = 36555^2 + 459014^2 .

It is not a de Polignac number, because 212030120221 - 2³ = 212030120213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212030120195 and 212030120204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212030120321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10485921 + ... + 10506121.

It is an arithmetic number, because the mean of its divisors is an integer number (14173349463).

Almost surely, 2^212030120221 is an apocalyptic number.

It is an amenable number.

212030120221 is a deficient number, since it is larger than the sum of its proper divisors (14743471187).

212030120221 is a wasteful number, since it uses less digits than its factorization.

212030120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26432.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 212030120221 its reverse (122021030212), we get a palindrome (334051150433).

Subtracting from 212030120221 its reverse (122021030212), we obtain a palindrome (90009090009).

The spelling of 212030120221 in words is "two hundred twelve billion, thirty million, one hundred twenty thousand, two hundred twenty-one".