121221202200111 has 48 divisors (see below), whose sum is σ = 189709302313440. Its totient is φ = 74586961537920.

The previous prime is 121221202200097. The next prime is 121221202200121. The reversal of 121221202200111 is 111002202122121.

121221202200111 is a `hidden beast` number, since 1 + 212 + 2 + 120 + 220 + 0 + 111 = 666.

It is not a de Polignac number, because 121221202200111 - 2¹⁵ = 121221202167343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221202200121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 138508651 + ... + 139381091.

It is an arithmetic number, because the mean of its divisors is an integer number (3952277131530).

Almost surely, 2^{121221202200111} is an apocalyptic number.

121221202200111 is a deficient number, since it is larger than the sum of its proper divisors (68488100113329).

121221202200111 is an equidigital number, since it uses as much as digits as its factorization.

121221202200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879513 (or 879484 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121221202200111 its reverse (111002202122121), we get a palindrome (232223404322232).

The spelling of 121221202200111 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred two million, two hundred thousand, one hundred eleven".