121220310211 has 64 divisors (see below), whose sum is σ = 175253621760. Its totient is φ = 80670965760.

The previous prime is 121220310209. The next prime is 121220310217. The reversal of 121220310211 is 112013022121.

It is not a de Polignac number, because 121220310211 - 2¹ = 121220310209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121220310217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 943635 + ... + 1064371.

It is an arithmetic number, because the mean of its divisors is an integer number (2738337840).

Almost surely, 2^121220310211 is an apocalyptic number.

121220310211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121220310211 is a deficient number, since it is larger than the sum of its proper divisors (54033311549).

121220310211 is a wasteful number, since it uses less digits than its factorization.

121220310211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120844.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121220310211 its reverse (112013022121), we get a palindrome (233233332332).

The spelling of 121220310211 in words is "one hundred twenty-one billion, two hundred twenty million, three hundred ten thousand, two hundred eleven".