1001101021200 has 480 divisors, whose sum is σ = 4099579872000. Its totient is φ = 227284807680.

The previous prime is 1001101021183. The next prime is 1001101021213. The reversal of 1001101021200 is 21201011001.

It is a happy number.

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

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11219964 + ... + 11308836.

It is an arithmetic number, because the mean of its divisors is an integer number (8540791400).

Almost surely, 2^{1001101021200} is an apocalyptic number.

1001101021200 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 1001101021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2049789936000).

1001101021200 is an abundant number, since it is smaller than the sum of its proper divisors (3098478850800).

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

1001101021200 is a wasteful number, since it uses less digits than its factorization.

1001101021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89056 (or 89039 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1001101021200 its reverse (21201011001), we get a palindrome (1022302032201).

The spelling of 1001101021200 in words is "one trillion, one billion, one hundred one million, twenty-one thousand, two hundred".