100121111110001 has 4 divisors (see below), whose sum is σ = 100121397947892. Its totient is φ = 100120824272112.

The previous prime is 100121111109983. The next prime is 100121111110063. The reversal of 100121111110001 is 100011111121001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78637876840000 + 21483234270001 = 8867800^2 + 4635001^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100121111110001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100121111110081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142894730 + ... + 143593683.

It is an arithmetic number, because the mean of its divisors is an integer number (25030349486973).

Almost surely, 2^{100121111110001} is an apocalyptic number.

It is an amenable number.

100121111110001 is a deficient number, since it is larger than the sum of its proper divisors (286837891).

100121111110001 is an equidigital number, since it uses as much as digits as its factorization.

100121111110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286837890.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 100121111110001 its reverse (100011111121001), we get a palindrome (200132222231002).

The spelling of 100121111110001 in words is "one hundred trillion, one hundred twenty-one billion, one hundred eleven million, one hundred ten thousand, one".