212120130001 has 4 divisors (see below), whose sum is σ = 228437063092. Its totient is φ = 195803196912.

The previous prime is 212120129953. The next prime is 212120130017. The reversal of 212120130001 is 100031021212.

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 68539763601 + 143580366400 = 261801^2 + 378920^2 .

It is a cyclic number.

It is not a de Polignac number, because 212120130001 - 2¹⁷ = 212119998929 is a prime.

It is a super-2 number, since 2×212120130001² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 16316933077 = 212120130001 / (2 + 1 + 2 + 1 + 2 + 0 + 1 + 3 + 0 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212120130031) 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, 8158466526 + ... + 8158466551.

It is an arithmetic number, because the mean of its divisors is an integer number (57109265773).

Almost surely, 2^212120130001 is an apocalyptic number.

It is an amenable number.

212120130001 is a deficient number, since it is larger than the sum of its proper divisors (16316933091).

212120130001 is a wasteful number, since it uses less digits than its factorization.

212120130001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16316933090.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 212120130001 its reverse (100031021212), we get a palindrome (312151151213).

The spelling of 212120130001 in words is "two hundred twelve billion, one hundred twenty million, one hundred thirty thousand, one".