212010122021 has 4 divisors (see below), whose sum is σ = 213181448844. Its totient is φ = 210838795200.

The previous prime is 212010122011. The next prime is 212010122053. The reversal of 212010122021 is 120221010212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31227837796 + 180782284225 = 176714^2 + 425185^2 .

It is a cyclic number.

It is not a de Polignac number, because 212010122021 - 2⁶ = 212010121957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212010121987 and 212010122005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212010122011) 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, 585663140 + ... + 585663501.

It is an arithmetic number, because the mean of its divisors is an integer number (53295362211).

Almost surely, 2^212010122021 is an apocalyptic number.

It is an amenable number.

212010122021 is a deficient number, since it is larger than the sum of its proper divisors (1171326823).

212010122021 is a wasteful number, since it uses less digits than its factorization.

212010122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171326822.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212010122021 its reverse (120221010212), we get a palindrome (332231132233).

The spelling of 212010122021 in words is "two hundred twelve billion, ten million, one hundred twenty-two thousand, twenty-one".