121221201110011 has 4 divisors (see below), whose sum is σ = 121227906953232. Its totient is φ = 121214495266792.

The previous prime is 121221201109993. The next prime is 121221201110027. The reversal of 121221201110011 is 110011102122121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121221201110011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121221201117011) 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, 3352894495 + ... + 3352930648.

It is an arithmetic number, because the mean of its divisors is an integer number (30306976738308).

Almost surely, 2^{121221201110011} is an apocalyptic number.

121221201110011 is a deficient number, since it is larger than the sum of its proper divisors (6705843221).

121221201110011 is an equidigital number, since it uses as much as digits as its factorization.

121221201110011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6705843220.

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

Adding to 121221201110011 its reverse (110011102122121), we get a palindrome (231232303232132).

The spelling of 121221201110011 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred one million, one hundred ten thousand, eleven".