1212112110111 has 48 divisors (see below), whose sum is σ = 1883114161920. Its totient is φ = 691493241600.

The previous prime is 1212112110091. The next prime is 1212112110151. The reversal of 1212112110111 is 1110112112121.

It is not a de Polignac number, because 1212112110111 - 2²³ = 1212103721503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212112110151) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 299211036 + ... + 299215086.

It is an arithmetic number, because the mean of its divisors is an integer number (39231545040).

Almost surely, 2^{1212112110111} is an apocalyptic number.

1212112110111 is a deficient number, since it is larger than the sum of its proper divisors (671002051809).

1212112110111 is a wasteful number, since it uses less digits than its factorization.

1212112110111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6924 (or 6917 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1212112110111 its reverse (1110112112121), we get a palindrome (2322224222232).

It can be divided in two parts, 121211 and 2110111, that added together give a palindrome (2231322).

The spelling of 1212112110111 in words is "one trillion, two hundred twelve billion, one hundred twelve million, one hundred ten thousand, one hundred eleven".