121220121120211 has 8 divisors (see below), whose sum is σ = 125453555331120. Its totient is φ = 116990248911648.

The previous prime is 121220121120209. The next prime is 121220121120223. The reversal of 121220121120211 is 112021121022121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121220121120211 - 2¹ = 121220121120209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121220121127211) 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, 890431336 + ... + 890567461.

It is an arithmetic number, because the mean of its divisors is an integer number (15681694416390).

Almost surely, 2^{121220121120211} is an apocalyptic number.

121220121120211 is a deficient number, since it is larger than the sum of its proper divisors (4233434210909).

121220121120211 is a wasteful number, since it uses less digits than its factorization.

121220121120211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781001173.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121220121120211 its reverse (112021121022121), we get a palindrome (233241242142332).

The spelling of 121220121120211 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred twenty-one million, one hundred twenty thousand, two hundred eleven".