2121112200111 has 16 divisors (see below), whose sum is σ = 2832242644224. Its totient is φ = 1412029735424.

The previous prime is 2121112200073. The next prime is 2121112200167. The reversal of 2121112200111 is 1110022111212.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121112200111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121112200511) 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, 5686396 + ... + 6047918.

It is an arithmetic number, because the mean of its divisors is an integer number (177015165264).

Almost surely, 2^{2121112200111} is an apocalyptic number.

2121112200111 is a deficient number, since it is larger than the sum of its proper divisors (711130444113).

2121112200111 is a wasteful number, since it uses less digits than its factorization.

2121112200111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364350.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2121112200111 its reverse (1110022111212), we get a palindrome (3231134311323).

The spelling of 2121112200111 in words is "two trillion, one hundred twenty-one billion, one hundred twelve million, two hundred thousand, one hundred eleven".