121220211 has 8 divisors (see below), whose sum is σ = 184716544. Its totient is φ = 69268680.

The previous prime is 121220201. The next prime is 121220213. The reversal of 121220211 is 112022121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121220211 - 2⁵ = 121220179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121220213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2886175 + ... + 2886216.

It is an arithmetic number, because the mean of its divisors is an integer number (23089568).

Almost surely, 2^121220211 is an apocalyptic number.

121220211 is a deficient number, since it is larger than the sum of its proper divisors (63496333).

121220211 is an equidigital number, since it uses as much as digits as its factorization.

121220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5772401.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 121220211 is about 11010.0050408708. The cubic root of 121220211 is about 494.9086128608.

Adding to 121220211 its reverse (112022121), we get a palindrome (233242332).

The spelling of 121220211 in words is "one hundred twenty-one million, two hundred twenty thousand, two hundred eleven".