20121200202111 has 16 divisors (see below), whose sum is σ = 26977855029600. Its totient is φ = 13339393966080.

The previous prime is 20121200202101. The next prime is 20121200202203. The reversal of 20121200202111 is 11120200212102.

It is not a de Polignac number, because 20121200202111 - 2⁷ = 20121200201983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121200202101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5340850 + ... + 8292591.

It is an arithmetic number, because the mean of its divisors is an integer number (1686115939350).

Almost surely, 2^{20121200202111} is an apocalyptic number.

20121200202111 is a deficient number, since it is larger than the sum of its proper divisors (6856654827489).

20121200202111 is a wasteful number, since it uses less digits than its factorization.

20121200202111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13636186.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20121200202111 its reverse (11120200212102), we get a palindrome (31241400414213).

Subtracting from 20121200202111 its reverse (11120200212102), we obtain a palindrome (9000999990009).

The spelling of 20121200202111 in words is "twenty trillion, one hundred twenty-one billion, two hundred million, two hundred two thousand, one hundred eleven".