1001111211012 has 144 divisors (see below), whose sum is σ = 2590183512000. Its totient is φ = 300705926400.

The previous prime is 1001111211011. The next prime is 1001111211029. The reversal of 1001111211012 is 2101121111001.

It is a super-3 number, since 3×1001111211012³ (a number of 37 digits) contains 333 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1001111211011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 110116587 + ... + 110125677.

It is an arithmetic number, because the mean of its divisors is an integer number (17987385500).

Almost surely, 2^{1001111211012} is an apocalyptic number.

1001111211012 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 1001111211012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1295091756000).

1001111211012 is an abundant number, since it is smaller than the sum of its proper divisors (1589072300988).

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

1001111211012 is a wasteful number, since it uses less digits than its factorization.

1001111211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9778 (or 9765 counting only the distinct ones).

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

Adding to 1001111211012 its reverse (2101121111001), we get a palindrome (3102232322013).

The spelling of 1001111211012 in words is "one trillion, one billion, one hundred eleven million, two hundred eleven thousand, twelve".