220103111021221 has 2 divisors, whose sum is σ = 220103111021222. Its totient is φ = 220103111021220.

The previous prime is 220103111021177. The next prime is 220103111021267. The reversal of 220103111021221 is 122120111301022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155014601636196 + 65088509385025 = 12450486^2 + 8067745^2 .

It is a cyclic number.

It is not a de Polignac number, because 220103111021221 - 2¹⁷ = 220103110890149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220103111021281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110051555510610 + 110051555510611.

It is an arithmetic number, because the mean of its divisors is an integer number (110051555510611).

Almost surely, 2^{220103111021221} is an apocalyptic number.

It is an amenable number.

220103111021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

220103111021221 is an equidigital number, since it uses as much as digits as its factorization.

220103111021221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 220103111021221 its reverse (122120111301022), we get a palindrome (342223222322243).

The spelling of 220103111021221 in words is "two hundred twenty trillion, one hundred three billion, one hundred eleven million, twenty-one thousand, two hundred twenty-one".