1011211100112 has 80 divisors (see below), whose sum is σ = 2753487336960. Its totient is φ = 318899822976.

The previous prime is 1011211100111. The next prime is 1011211100173. The reversal of 1011211100112 is 2110011121101.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011211100111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68538 + ... + 1423769.

It is an arithmetic number, because the mean of its divisors is an integer number (34418591712).

Almost surely, 2^{1011211100112} is an apocalyptic number.

1011211100112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1011211100112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1376743668480).

1011211100112 is an abundant number, since it is smaller than the sum of its proper divisors (1742276236848).

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

1011211100112 is a wasteful number, since it uses less digits than its factorization.

1011211100112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493080 (or 1493074 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1011211100112 its reverse (2110011121101), we get a palindrome (3121222221213).

The spelling of 1011211100112 in words is "one trillion, eleven billion, two hundred eleven million, one hundred thousand, one hundred twelve".