100001010021121 has 4 divisors (see below), whose sum is σ = 109092010932144. Its totient is φ = 90910009110100.

The previous prime is 100001010021089. The next prime is 100001010021139. The reversal of 100001010021121 is 121120010100001.

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 100001010021121 - 2⁵ = 100001010021089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100001010021098 and 100001010021107.

It is not an unprimeable number, because it can be changed into a prime (100001010021721) 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, 4545500455495 + ... + 4545500455516.

It is an arithmetic number, because the mean of its divisors is an integer number (27273002733036).

Almost surely, 2^{100001010021121} is an apocalyptic number.

100001010021121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100001010021121 is a deficient number, since it is larger than the sum of its proper divisors (9091000911023).

100001010021121 is an equidigital number, since it uses as much as digits as its factorization.

100001010021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9091000911022.

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

Adding to 100001010021121 its reverse (121120010100001), we get a palindrome (221121020121122).

The spelling of 100001010021121 in words is "one hundred trillion, one billion, ten million, twenty-one thousand, one hundred twenty-one".