20121202201111 has 16 divisors (see below), whose sum is σ = 22744355974560. Its totient is φ = 17632431976320.

The previous prime is 20121202201091. The next prime is 20121202201141. The reversal of 20121202201111 is 11110220212102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121202201111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121202201141) 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 15 ways as a sum of consecutive naturals, for example, 51252960 + ... + 51644053.

It is an arithmetic number, because the mean of its divisors is an integer number (1421522248410).

Almost surely, 2^{20121202201111} is an apocalyptic number.

20121202201111 is a deficient number, since it is larger than the sum of its proper divisors (2623153773449).

20121202201111 is a wasteful number, since it uses less digits than its factorization.

20121202201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102897666.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20121202201111 its reverse (11110220212102), we get a palindrome (31231422413213).

The spelling of 20121202201111 in words is "twenty trillion, one hundred twenty-one billion, two hundred two million, two hundred one thousand, one hundred eleven".