1212111210112 has 64 divisors (see below), whose sum is σ = 2772921938400. Its totient is φ = 521961753600.

The previous prime is 1212111210061. The next prime is 1212111210113. The reversal of 1212111210112 is 2110121112121.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×1212111210112² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1212111210113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22627839 + ... + 22681342.

Almost surely, 2^{1212111210112} is an apocalyptic number.

It is an amenable number.

1212111210112 is an abundant number, since it is smaller than the sum of its proper divisors (1560810728288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212111210112 is a wasteful number, since it uses less digits than its factorization.

1212111210112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45309225 (or 45309213 counting only the distinct ones).

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

Adding to 1212111210112 its reverse (2110121112121), we get a palindrome (3322232322233).

The spelling of 1212111210112 in words is "one trillion, two hundred twelve billion, one hundred eleven million, two hundred ten thousand, one hundred twelve".