121010220211111 has 24 divisors (see below), whose sum is σ = 158517667146240. Its totient is φ = 91251946522800.

The previous prime is 121010220211093. The next prime is 121010220211123. The reversal of 121010220211111 is 111112022010121.

It is not a de Polignac number, because 121010220211111 - 2¹⁹ = 121010219686823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010220211711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3621092281 + ... + 3621125698.

It is an arithmetic number, because the mean of its divisors is an integer number (6604902797760).

Almost surely, 2^{121010220211111} is an apocalyptic number.

121010220211111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121010220211111 is a deficient number, since it is larger than the sum of its proper divisors (37507446935129).

121010220211111 is a wasteful number, since it uses less digits than its factorization.

121010220211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7242218035 (or 7242218028 counting only the distinct ones).

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

Adding to 121010220211111 its reverse (111112022010121), we get a palindrome (232122242221232).

The spelling of 121010220211111 in words is "one hundred twenty-one trillion, ten billion, two hundred twenty million, two hundred eleven thousand, one hundred eleven".