220221202111121 has 4 divisors (see below), whose sum is σ = 220221235417200. Its totient is φ = 220221168805044.

The previous prime is 220221202111093. The next prime is 220221202111147. The reversal of 220221202111121 is 121111202122022.

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-220221202111121 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 = 220221202111093 and 220221202111102.

It is not an unprimeable number, because it can be changed into a prime (220221202111021) 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, 3008411 + ... + 21201248.

It is an arithmetic number, because the mean of its divisors is an integer number (55055308854300).

Almost surely, 2^{220221202111121} is an apocalyptic number.

It is an amenable number.

220221202111121 is a deficient number, since it is larger than the sum of its proper divisors (33306079).

220221202111121 is an equidigital number, since it uses as much as digits as its factorization.

220221202111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33306078.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 220221202111121 its reverse (121111202122022), we get a palindrome (341332404233143).

The spelling of 220221202111121 in words is "two hundred twenty trillion, two hundred twenty-one billion, two hundred two million, one hundred eleven thousand, one hundred twenty-one".