212120330101 has 4 divisors (see below), whose sum is σ = 212132572704. Its totient is φ = 212108087500.

The previous prime is 212120330099. The next prime is 212120330141. The reversal of 212120330101 is 101033021212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212120330101 - 2¹ = 212120330099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212120330141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6095275 + ... + 6129976.

It is an arithmetic number, because the mean of its divisors is an integer number (53033143176).

Almost surely, 2^212120330101 is an apocalyptic number.

It is an amenable number.

212120330101 is a deficient number, since it is larger than the sum of its proper divisors (12242603).

212120330101 is a wasteful number, since it uses less digits than its factorization.

212120330101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12242602.

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

Adding to 212120330101 its reverse (101033021212), we get a palindrome (313153351313).

The spelling of 212120330101 in words is "two hundred twelve billion, one hundred twenty million, three hundred thirty thousand, one hundred one".