103220213121221 has 4 divisors (see below), whose sum is σ = 117965957852832. Its totient is φ = 88474468389612.

The previous prime is 103220213121211. The next prime is 103220213121227. The reversal of 103220213121221 is 122121312022301.

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-103220213121221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103220213121227) 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, 7372872365795 + ... + 7372872365808.

It is an arithmetic number, because the mean of its divisors is an integer number (29491489463208).

Almost surely, 2^{103220213121221} is an apocalyptic number.

It is an amenable number.

103220213121221 is a deficient number, since it is larger than the sum of its proper divisors (14745744731611).

103220213121221 is an equidigital number, since it uses as much as digits as its factorization.

103220213121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14745744731610.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 103220213121221 its reverse (122121312022301), we get a palindrome (225341525143522).

The spelling of 103220213121221 in words is "one hundred three trillion, two hundred twenty billion, two hundred thirteen million, one hundred twenty-one thousand, two hundred twenty-one".