221120010121 has 4 divisors (see below), whose sum is σ = 221121004672. Its totient is φ = 221119015572.

The previous prime is 221120010119. The next prime is 221120010151. The reversal of 221120010121 is 121010021122.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 221120010121 - 2¹ = 221120010119 is a prime.

It is a super-2 number, since 2×221120010121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221120010151) 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, 6016 + ... + 665038.

It is an arithmetic number, because the mean of its divisors is an integer number (55280251168).

Almost surely, 2^221120010121 is an apocalyptic number.

It is an amenable number.

221120010121 is a deficient number, since it is larger than the sum of its proper divisors (994551).

221120010121 is an equidigital number, since it uses as much as digits as its factorization.

221120010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994550.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221120010121 its reverse (121010021122), we get a palindrome (342130031243).

The spelling of 221120010121 in words is "two hundred twenty-one billion, one hundred twenty million, ten thousand, one hundred twenty-one".