101111121001000 has 128 divisors (see below), whose sum is σ = 258120955272960. Its totient is φ = 36765993888000.

The previous prime is 101111121000977. The next prime is 101111121001087. The reversal of 101111121001000 is 100121111101.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 253493722 + ... + 253892278.

It is an arithmetic number, because the mean of its divisors is an integer number (2016569963070).

Almost surely, 2^{101111121001000} is an apocalyptic number.

101111121001000 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 101111121001000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129060477636480).

101111121001000 is an abundant number, since it is smaller than the sum of its proper divisors (157009834271960).

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

101111121001000 is a wasteful number, since it uses less digits than its factorization.

101111121001000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421652 (or 421638 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 101111121001000 its reverse (100121111101), we get a palindrome (101211242112101).

The spelling of 101111121001000 in words is "one hundred one trillion, one hundred eleven billion, one hundred twenty-one million, one thousand".