212101112101 has 4 divisors (see below), whose sum is σ = 212946136704. Its totient is φ = 211256087500.

The previous prime is 212101112087. The next prime is 212101112123. The reversal of 212101112101 is 101211101212.

It is a happy number.

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 212101112101 - 2¹³ = 212101103909 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 (212101112131) 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, 422511925 + ... + 422512426.

It is an arithmetic number, because the mean of its divisors is an integer number (53236534176).

Almost surely, 2^212101112101 is an apocalyptic number.

It is an amenable number.

212101112101 is a deficient number, since it is larger than the sum of its proper divisors (845024603).

212101112101 is an equidigital number, since it uses as much as digits as its factorization.

212101112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845024602.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 212101112101 its reverse (101211101212), we get a palindrome (313312213313).

It can be divided in two parts, 21210 and 1112101, that added together give a palindrome (1133311).

The spelling of 212101112101 in words is "two hundred twelve billion, one hundred one million, one hundred twelve thousand, one hundred one".