100001021121001 has 16 divisors (see below), whose sum is σ = 134267105282688. Its totient is φ = 71928806400000.

The previous prime is 100001021120951. The next prime is 100001021121011. The reversal of 100001021121001 is 100121120100001.

It is not a de Polignac number, because 100001021121001 - 2²⁹ = 100000484250089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100001021121011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49950559000 + ... + 49950561001.

It is an arithmetic number, because the mean of its divisors is an integer number (8391694080168).

Almost surely, 2^{100001021121001} is an apocalyptic number.

100001021121001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100001021121001 is a deficient number, since it is larger than the sum of its proper divisors (34266084161687).

100001021121001 is a wasteful number, since it uses less digits than its factorization.

100001021121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99901120032.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 100001021121001 its reverse (100121120100001), we get a palindrome (200122141221002).

The spelling of 100001021121001 in words is "one hundred trillion, one billion, twenty-one million, one hundred twenty-one thousand, one".