100010121021001 has 4 divisors (see below), whose sum is σ = 105893069316372. Its totient is φ = 94127172725632.

The previous prime is 100010121020903. The next prime is 100010121021011. The reversal of 100010121021001 is 100120121010001.

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 83749677705225 + 16260443315776 = 9151485^2 + 4032424^2 .

It is a cyclic number.

It is not a de Polignac number, because 100010121021001 - 2¹¹ = 100010121018953 is a prime.

It is a super-2 number, since 2×100010121021001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100010121021011) 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, 2941474147660 + ... + 2941474147693.

It is an arithmetic number, because the mean of its divisors is an integer number (26473267329093).

Almost surely, 2^{100010121021001} is an apocalyptic number.

It is an amenable number.

100010121021001 is a deficient number, since it is larger than the sum of its proper divisors (5882948295371).

100010121021001 is an equidigital number, since it uses as much as digits as its factorization.

100010121021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5882948295370.

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

Adding to 100010121021001 its reverse (100120121010001), we get a palindrome (200130242031002).

The spelling of 100010121021001 in words is "one hundred trillion, ten billion, one hundred twenty-one million, twenty-one thousand, one".