220121100211 has 4 divisors (see below), whose sum is σ = 220124823912. Its totient is φ = 220117376512.

The previous prime is 220121100169. The next prime is 220121100233. The reversal of 220121100211 is 112001121022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220121100211 - 2¹¹ = 220121098163 is a prime.

It is a super-2 number, since 2×220121100211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220121100191 and 220121100200.

It is not an unprimeable number, because it can be changed into a prime (220121100911) 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, 1771726 + ... + 1891891.

It is an arithmetic number, because the mean of its divisors is an integer number (55031205978).

Almost surely, 2^220121100211 is an apocalyptic number.

220121100211 is a deficient number, since it is larger than the sum of its proper divisors (3723701).

220121100211 is an equidigital number, since it uses as much as digits as its factorization.

220121100211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3723700.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 220121100211 its reverse (112001121022), we get a palindrome (332122221233).

The spelling of 220121100211 in words is "two hundred twenty billion, one hundred twenty-one million, one hundred thousand, two hundred eleven".