121111011211 has 8 divisors (see below), whose sum is σ = 122970381824. Its totient is φ = 119253162600.

The previous prime is 121111011209. The next prime is 121111011251. The reversal of 121111011211 is 112110111121.

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 121111011211 - 2¹ = 121111011209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121111011191 and 121111011200.

It is not an unprimeable number, because it can be changed into a prime (121111011251) 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, 219615 + ... + 538936.

It is an arithmetic number, because the mean of its divisors is an integer number (15371297728).

Almost surely, 2^121111011211 is an apocalyptic number.

121111011211 is a deficient number, since it is larger than the sum of its proper divisors (1859370613).

121111011211 is an equidigital number, since it uses as much as digits as its factorization.

121111011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761001.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 121111011211 its reverse (112110111121), we get a palindrome (233221122332).

The spelling of 121111011211 in words is "one hundred twenty-one billion, one hundred eleven million, eleven thousand, two hundred eleven".