1212000111111 has 16 divisors (see below), whose sum is σ = 1711649820384. Its totient is φ = 760208062464.

The previous prime is 1212000111109. The next prime is 1212000111131. The reversal of 1212000111111 is 1111110002121.

It is not a de Polignac number, because 1212000111111 - 2¹ = 1212000111109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212000111131) 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, 3953860 + ... + 4249353.

It is an arithmetic number, because the mean of its divisors is an integer number (106978113774).

Almost surely, 2^{1212000111111} is an apocalyptic number.

1212000111111 is a deficient number, since it is larger than the sum of its proper divisors (499649709273).

1212000111111 is a wasteful number, since it uses less digits than its factorization.

1212000111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8206130.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1212000111111 its reverse (1111110002121), we get a palindrome (2323110113232).

The spelling of 1212000111111 in words is "one trillion, two hundred twelve billion, one hundred eleven thousand, one hundred eleven".