1000001131200 has 504 divisors, whose sum is σ = 3694443571728. Its totient is φ = 256322396160.

The previous prime is 1000001131169. The next prime is 1000001131313. The reversal of 1000001131200 is 21311000001.

It is a super-2 number, since 2×1000001131200² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 44211094 + ... + 44233706.

It is an arithmetic number, because the mean of its divisors is an integer number (7330245182).

Almost surely, 2^{1000001131200} is an apocalyptic number.

1000001131200 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 1000001131200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1847221785864).

1000001131200 is an abundant number, since it is smaller than the sum of its proper divisors (2694442440528).

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

1000001131200 is a wasteful number, since it uses less digits than its factorization.

1000001131200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22761 (or 22743 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

Adding to 1000001131200 its reverse (21311000001), we get a palindrome (1021312131201).

The spelling of 1000001131200 in words is "one trillion, one million, one hundred thirty-one thousand, two hundred".