212010330121 has 4 divisors (see below), whose sum is σ = 212011583812. Its totient is φ = 212009076432.

The previous prime is 212010330107. The next prime is 212010330137. The reversal of 212010330121 is 121033010212.

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 95319770121 + 116690560000 = 308739^2 + 341600^2 .

It is a cyclic number.

It is not a de Polignac number, because 212010330121 - 2¹⁵ = 212010297353 is a prime.

It is a super-3 number, since 3×212010330121³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212010330095 and 212010330104.

It is not an unprimeable number, because it can be changed into a prime (212010300121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324606 + ... + 727591.

It is an arithmetic number, because the mean of its divisors is an integer number (53002895953).

Almost surely, 2^212010330121 is an apocalyptic number.

It is an amenable number.

212010330121 is a deficient number, since it is larger than the sum of its proper divisors (1253691).

212010330121 is a wasteful number, since it uses less digits than its factorization.

212010330121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253690.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 212010330121 its reverse (121033010212), we get a palindrome (333043340333).

The spelling of 212010330121 in words is "two hundred twelve billion, ten million, three hundred thirty thousand, one hundred twenty-one".