121220211222111 has 8 divisors (see below), whose sum is σ = 161640298220544. Its totient is φ = 80806799185880.

The previous prime is 121220211222073. The next prime is 121220211222119. The reversal of 121220211222111 is 111222112022121.

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 121220211222111 - 2⁴¹ = 119021187966559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220211222119) 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, 1668698175 + ... + 1668770816.

It is an arithmetic number, because the mean of its divisors is an integer number (20205037277568).

Almost surely, 2^{121220211222111} is an apocalyptic number.

121220211222111 is a deficient number, since it is larger than the sum of its proper divisors (40420086998433).

121220211222111 is a wasteful number, since it uses less digits than its factorization.

121220211222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3337481101.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 121220211222111 its reverse (111222112022121), we get a palindrome (232442323244232).

The spelling of 121220211222111 in words is "one hundred twenty-one trillion, two hundred twenty billion, two hundred eleven million, two hundred twenty-two thousand, one hundred eleven".