2112121200111 has 16 divisors (see below), whose sum is σ = 3103319404416. Its totient is φ = 1269539754336.

The previous prime is 2112121200043. The next prime is 2112121200173. The reversal of 2112121200111 is 1110021212112.

It is a happy number.

It is not a de Polignac number, because 2112121200111 - 2¹³ = 2112121191919 is a prime.

It is a super-2 number, since 2×2112121200111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112121200181) 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, 629730345 + ... + 629733698.

It is an arithmetic number, because the mean of its divisors is an integer number (193957462776).

Almost surely, 2^{2112121200111} is an apocalyptic number.

2112121200111 is a deficient number, since it is larger than the sum of its proper divisors (991198204305).

2112121200111 is a wasteful number, since it uses less digits than its factorization.

2112121200111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259464102.

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

Adding to 2112121200111 its reverse (1110021212112), we get a palindrome (3222142412223).

The spelling of 2112121200111 in words is "two trillion, one hundred twelve billion, one hundred twenty-one million, two hundred thousand, one hundred eleven".