1000221110121 has 4 divisors (see below), whose sum is σ = 1333628146832. Its totient is φ = 666814073412.

The previous prime is 1000221110087. The next prime is 1000221110123. The reversal of 1000221110121 is 1210111220001.

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 not a de Polignac number, because 1000221110121 - 2⁹ = 1000221109609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000221110097 and 1000221110106.

It is not an unprimeable number, because it can be changed into a prime (1000221110123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166703518351 + ... + 166703518356.

It is an arithmetic number, because the mean of its divisors is an integer number (333407036708).

Almost surely, 2^{1000221110121} is an apocalyptic number.

It is an amenable number.

1000221110121 is a deficient number, since it is larger than the sum of its proper divisors (333407036711).

1000221110121 is an equidigital number, since it uses as much as digits as its factorization.

1000221110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333407036710.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1000221110121 its reverse (1210111220001), we get a palindrome (2210332330122).

The spelling of 1000221110121 in words is "one trillion, two hundred twenty-one million, one hundred ten thousand, one hundred twenty-one".