212110221101 has 4 divisors (see below), whose sum is σ = 213514924704. Its totient is φ = 210705517500.

The previous prime is 212110221047. The next prime is 212110221143. The reversal of 212110221101 is 101122011212.

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 a de Polignac number, because none of the positive numbers 2^k-212110221101 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 (212110221151) 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, 702351575 + ... + 702351876.

It is an arithmetic number, because the mean of its divisors is an integer number (53378731176).

Almost surely, 2^212110221101 is an apocalyptic number.

It is an amenable number.

212110221101 is a deficient number, since it is larger than the sum of its proper divisors (1404703603).

212110221101 is a wasteful number, since it uses less digits than its factorization.

212110221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404703602.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212110221101 its reverse (101122011212), we get a palindrome (313232232313).

The spelling of 212110221101 in words is "two hundred twelve billion, one hundred ten million, two hundred twenty-one thousand, one hundred one".