212030122121 has 4 divisors (see below), whose sum is σ = 212041444932. Its totient is φ = 212018799312.

The previous prime is 212030122111. The next prime is 212030122127. The reversal of 212030122121 is 121221030212.

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 181050250000 + 30979872121 = 425500^2 + 176011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212030122121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212030122121.

It is not an unprimeable number, because it can be changed into a prime (212030122127) 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, 5633270 + ... + 5670783.

It is an arithmetic number, because the mean of its divisors is an integer number (53010361233).

Almost surely, 2^212030122121 is an apocalyptic number.

It is an amenable number.

212030122121 is a deficient number, since it is larger than the sum of its proper divisors (11322811).

212030122121 is a wasteful number, since it uses less digits than its factorization.

212030122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11322810.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 212030122121 its reverse (121221030212), we get a palindrome (333251152333).

The spelling of 212030122121 in words is "two hundred twelve billion, thirty million, one hundred twenty-two thousand, one hundred twenty-one".