212231101 has 4 divisors (see below), whose sum is σ = 217166752. Its totient is φ = 207295452.

The previous prime is 212231087. The next prime is 212231119. The reversal of 212231101 is 101132212.

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 212231101 - 2⁵ = 212231069 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 (212231161) 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, 2467761 + ... + 2467846.

It is an arithmetic number, because the mean of its divisors is an integer number (54291688).

Almost surely, 2^212231101 is an apocalyptic number.

It is an amenable number.

212231101 is a deficient number, since it is larger than the sum of its proper divisors (4935651).

212231101 is an equidigital number, since it uses as much as digits as its factorization.

212231101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4935650.

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

The square root of 212231101 is about 14568.1536578936. The cubic root of 212231101 is about 596.4897827091.

Adding to 212231101 its reverse (101132212), we get a palindrome (313363313).

The spelling of 212231101 in words is "two hundred twelve million, two hundred thirty-one thousand, one hundred one".