220105121211 has 12 divisors (see below), whose sum is σ = 318018152088. Its totient is φ = 146695886304.

The previous prime is 220105121209. The next prime is 220105121227. The reversal of 220105121211 is 112121501022.

220105121211 is a `hidden beast` number, since 2 + 20 + 10 + 512 + 121 + 1 = 666.

It is not a de Polignac number, because 220105121211 - 2¹ = 220105121209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220105121261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3370965 + ... + 3435638.

It is an arithmetic number, because the mean of its divisors is an integer number (26501512674).

Almost surely, 2^220105121211 is an apocalyptic number.

220105121211 is a deficient number, since it is larger than the sum of its proper divisors (97913030877).

220105121211 is a wasteful number, since it uses less digits than its factorization.

220105121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6810202 (or 6810199 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 220105121211 its reverse (112121501022), we get a palindrome (332226622233).

The spelling of 220105121211 in words is "two hundred twenty billion, one hundred five million, one hundred twenty-one thousand, two hundred eleven".