1212112330111 has 4 divisors (see below), whose sum is σ = 1212439843224. Its totient is φ = 1211784817000.

The previous prime is 1212112330103. The next prime is 1212112330147. The reversal of 1212112330111 is 1110332112121.

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 1212112330111 - 2³ = 1212112330103 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 (1212112330171) 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, 163751005 + ... + 163758406.

It is an arithmetic number, because the mean of its divisors is an integer number (303109960806).

Almost surely, 2^{1212112330111} is an apocalyptic number.

1212112330111 is a deficient number, since it is larger than the sum of its proper divisors (327513113).

1212112330111 is an equidigital number, since it uses as much as digits as its factorization.

1212112330111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327513112.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1212112330111 its reverse (1110332112121), we get a palindrome (2322444442232).

The spelling of 1212112330111 in words is "one trillion, two hundred twelve billion, one hundred twelve million, three hundred thirty thousand, one hundred eleven".