220111201010121 has 4 divisors (see below), whose sum is σ = 293481601346832. Its totient is φ = 146740800673412.

The previous prime is 220111201010083. The next prime is 220111201010189. The reversal of 220111201010121 is 121010102111022.

It is a happy number.

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 220111201010121 - 2¹⁰ = 220111201009097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220111201010121.

It is not an unprimeable number, because it can be changed into a prime (220111201010621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36685200168351 + ... + 36685200168356.

It is an arithmetic number, because the mean of its divisors is an integer number (73370400336708).

Almost surely, 2^{220111201010121} is an apocalyptic number.

It is an amenable number.

220111201010121 is a deficient number, since it is larger than the sum of its proper divisors (73370400336711).

220111201010121 is an equidigital number, since it uses as much as digits as its factorization.

220111201010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73370400336710.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 220111201010121 its reverse (121010102111022), we get a palindrome (341121303121143).

The spelling of 220111201010121 in words is "two hundred twenty trillion, one hundred eleven billion, two hundred one million, ten thousand, one hundred twenty-one".