1211111020112 has 40 divisors (see below), whose sum is σ = 2682032463936. Its totient is φ = 518992102656.

The previous prime is 1211111020109. The next prime is 1211111020117. The reversal of 1211111020112 is 2110201111121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211111020117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 483323 + ... + 1629669.

Almost surely, 2^{1211111020112} is an apocalyptic number.

It is an amenable number.

1211111020112 is an abundant number, since it is smaller than the sum of its proper divisors (1470921443824).

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

1211111020112 is a wasteful number, since it uses less digits than its factorization.

1211111020112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155795 (or 1155789 counting only the distinct ones).

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

Adding to 1211111020112 its reverse (2110201111121), we get a palindrome (3321312131233).

The spelling of 1211111020112 in words is "one trillion, two hundred eleven billion, one hundred eleven million, twenty thousand, one hundred twelve".