220001110012121 has 4 divisors (see below), whose sum is σ = 227097920012544. Its totient is φ = 212904300011700.

The previous prime is 220001110012091. The next prime is 220001110012139. The reversal of 220001110012121 is 121210011100022.

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 a de Polignac number, because none of the positive numbers 2^k-220001110012121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220001110012096 and 220001110012105.

It is not an unprimeable number, because it can be changed into a prime (220001110012181) 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, 3548405000165 + ... + 3548405000226.

It is an arithmetic number, because the mean of its divisors is an integer number (56774480003136).

Almost surely, 2^{220001110012121} is an apocalyptic number.

It is an amenable number.

220001110012121 is a deficient number, since it is larger than the sum of its proper divisors (7096810000423).

220001110012121 is an equidigital number, since it uses as much as digits as its factorization.

220001110012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7096810000422.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 220001110012121 its reverse (121210011100022), we get a palindrome (341211121112143).

The spelling of 220001110012121 in words is "two hundred twenty trillion, one billion, one hundred ten million, twelve thousand, one hundred twenty-one".