100001011012121 has 4 divisors (see below), whose sum is σ = 100001197027200. Its totient is φ = 100000824997044.

The previous prime is 100001011011989. The next prime is 100001011012127. The reversal of 100001011012121 is 121210110100001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100001011012121 - 2¹⁴ = 100001010995737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100001011012127) 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, 92198801 + ... + 93277118.

It is an arithmetic number, because the mean of its divisors is an integer number (25000299256800).

Almost surely, 2^{100001011012121} is an apocalyptic number.

It is an amenable number.

100001011012121 is a deficient number, since it is larger than the sum of its proper divisors (186015079).

100001011012121 is an equidigital number, since it uses as much as digits as its factorization.

100001011012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186015078.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 100001011012121 its reverse (121210110100001), we get a palindrome (221211121112122).

The spelling of 100001011012121 in words is "one hundred trillion, one billion, eleven million, twelve thousand, one hundred twenty-one".