121111013211 has 4 divisors (see below), whose sum is σ = 161481350952. Its totient is φ = 80740675472.

The previous prime is 121111013209. The next prime is 121111013227. The reversal of 121111013211 is 112310111121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121111013211 - 2¹ = 121111013209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121111013281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20185168866 + ... + 20185168871.

It is an arithmetic number, because the mean of its divisors is an integer number (40370337738).

Almost surely, 2^121111013211 is an apocalyptic number.

121111013211 is a deficient number, since it is larger than the sum of its proper divisors (40370337741).

121111013211 is an equidigital number, since it uses as much as digits as its factorization.

121111013211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40370337740.

The product of its (nonzero) digits is 12, while the sum is 15.

Adding to 121111013211 its reverse (112310111121), we get a palindrome (233421124332).

The spelling of 121111013211 in words is "one hundred twenty-one billion, one hundred eleven million, thirteen thousand, two hundred eleven".