212072111101 has 4 divisors (see below), whose sum is σ = 214454943900. Its totient is φ = 209689278304.

The previous prime is 212072111089. The next prime is 212072111143. The reversal of 212072111101 is 101111270212.

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 59073788601 + 152998322500 = 243051^2 + 391150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212072111101 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 (212072411101) 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, 1191416266 + ... + 1191416443.

It is an arithmetic number, because the mean of its divisors is an integer number (53613735975).

Almost surely, 2^212072111101 is an apocalyptic number.

It is an amenable number.

212072111101 is a deficient number, since it is larger than the sum of its proper divisors (2382832799).

212072111101 is an equidigital number, since it uses as much as digits as its factorization.

212072111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382832798.

The product of its (nonzero) digits is 56, while the sum is 19.

Adding to 212072111101 its reverse (101111270212), we get a palindrome (313183381313).

The spelling of 212072111101 in words is "two hundred twelve billion, seventy-two million, one hundred eleven thousand, one hundred one".