10001100121021 has 4 divisors (see below), whose sum is σ = 10031314925344. Its totient is φ = 9970885316700.

The previous prime is 10001100121013. The next prime is 10001100121031. The reversal of 10001100121021 is 12012100110001.

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 10001100121021 - 2³ = 10001100121013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10001100120989 and 10001100121007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001100121031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15107401665 + ... + 15107402326.

It is an arithmetic number, because the mean of its divisors is an integer number (2507828731336).

Almost surely, 2^{10001100121021} is an apocalyptic number.

It is an amenable number.

10001100121021 is a deficient number, since it is larger than the sum of its proper divisors (30214804323).

10001100121021 is an equidigital number, since it uses as much as digits as its factorization.

10001100121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30214804322.

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

Adding to 10001100121021 its reverse (12012100110001), we get a palindrome (22013200231022).

The spelling of 10001100121021 in words is "ten trillion, one billion, one hundred million, one hundred twenty-one thousand, twenty-one".