211000122101 has 4 divisors (see below), whose sum is σ = 211001064204. Its totient is φ = 210999180000.

The previous prime is 211000122089. The next prime is 211000122103. The reversal of 211000122101 is 101221000112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 202522500625 + 8477621476 = 450025^2 + 92074^2 .

It is a cyclic number.

It is not a de Polignac number, because 211000122101 - 2¹⁴ = 211000105717 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 (211000122103) 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, 79001 + ... + 654401.

It is an arithmetic number, because the mean of its divisors is an integer number (52750266051).

Almost surely, 2^211000122101 is an apocalyptic number.

It is an amenable number.

211000122101 is a deficient number, since it is larger than the sum of its proper divisors (942103).

211000122101 is an equidigital number, since it uses as much as digits as its factorization.

211000122101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942102.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 211000122101 its reverse (101221000112), we get a palindrome (312221122213).

The spelling of 211000122101 in words is "two hundred eleven billion, one hundred twenty-two thousand, one hundred one".