1001012111000 has 256 divisors, whose sum is σ = 2669683536000. Its totient is φ = 347961600000.

The previous prime is 1001012110979. The next prime is 1001012111003. The reversal of 1001012111000 is 1112101001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001012111003) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32203466 + ... + 32234534.

Almost surely, 2^{1001012111000} is an apocalyptic number.

1001012111000 is a gapful number since it is divisible by the number (10) 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 1001012111000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1334841768000).

1001012111000 is an abundant number, since it is smaller than the sum of its proper divisors (1668671425000).

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

1001012111000 is a wasteful number, since it uses less digits than its factorization.

1001012111000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31231 (or 31217 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 1001012111000 its reverse (1112101001), we get a palindrome (1002124212001).

Subtracting from 1001012111000 its reverse (1112101001), we obtain a palindrome (999900009999).

The spelling of 1001012111000 in words is "one trillion, one billion, twelve million, one hundred eleven thousand".