220220201122121 has 4 divisors (see below), whose sum is σ = 223321894095744. Its totient is φ = 217118508148500.

The previous prime is 220220201122079. The next prime is 220220201122127. The reversal of 220220201122121 is 121221102022022.

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 220220201122121 - 2⁴⁶ = 149851456944457 is a prime.

It is a super-3 number, since 3×220220201122121³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220220201122093 and 220220201122102.

It is not an unprimeable number, because it can be changed into a prime (220220201122127) 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, 1550846486705 + ... + 1550846486846.

It is an arithmetic number, because the mean of its divisors is an integer number (55830473523936).

Almost surely, 2^{220220201122121} is an apocalyptic number.

It is an amenable number.

220220201122121 is a deficient number, since it is larger than the sum of its proper divisors (3101692973623).

220220201122121 is an equidigital number, since it uses as much as digits as its factorization.

220220201122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3101692973622.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 220220201122121 its reverse (121221102022022), we get a palindrome (341441303144143).

The spelling of 220220201122121 in words is "two hundred twenty trillion, two hundred twenty billion, two hundred one million, one hundred twenty-two thousand, one hundred twenty-one".