212211110101 has 4 divisors (see below), whose sum is σ = 212213427552. Its totient is φ = 212208792652.

The previous prime is 212211110099. The next prime is 212211110119. The reversal of 212211110101 is 101011112212.

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 212211110101 - 2¹ = 212211110099 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 (212211110191) 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, 1015465 + ... + 1206478.

It is an arithmetic number, because the mean of its divisors is an integer number (53053356888).

Almost surely, 2^212211110101 is an apocalyptic number.

It is an amenable number.

212211110101 is a deficient number, since it is larger than the sum of its proper divisors (2317451).

212211110101 is an equidigital number, since it uses as much as digits as its factorization.

212211110101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2317450.

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

Adding to 212211110101 its reverse (101011112212), we get a palindrome (313222222313).

The spelling of 212211110101 in words is "two hundred twelve billion, two hundred eleven million, one hundred ten thousand, one hundred one".