1212112010111 has 4 divisors (see below), whose sum is σ = 1224113119224. Its totient is φ = 1200110901000.

The previous prime is 1212112010099. The next prime is 1212112010147. The reversal of 1212112010111 is 1110102112121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1212112010111 - 2⁶ = 1212112010047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212112010311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6000554405 + ... + 6000554606.

It is an arithmetic number, because the mean of its divisors is an integer number (306028279806).

Almost surely, 2^{1212112010111} is an apocalyptic number.

1212112010111 is a deficient number, since it is larger than the sum of its proper divisors (12001109113).

1212112010111 is a wasteful number, since it uses less digits than its factorization.

1212112010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12001109112.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1212112010111 its reverse (1110102112121), we get a palindrome (2322214122232).

It can be divided in two parts, 1212112010 and 111, that added together give a palindrome (1212112121).

The spelling of 1212112010111 in words is "one trillion, two hundred twelve billion, one hundred twelve million, ten thousand, one hundred eleven".