221220201111229 has 2 divisors, whose sum is σ = 221220201111230. Its totient is φ = 221220201111228.

The previous prime is 221220201111199. The next prime is 221220201111253. The reversal of 221220201111229 is 922111102022122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118330927512004 + 102889273599225 = 10878002^2 + 10143435^2 .

It is a cyclic number.

It is not a de Polignac number, because 221220201111229 - 2⁷ = 221220201111101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221220201111197 and 221220201111206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221220201114229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110610100555614 + 110610100555615.

It is an arithmetic number, because the mean of its divisors is an integer number (110610100555615).

Almost surely, 2^{221220201111229} is an apocalyptic number.

It is an amenable number.

221220201111229 is a deficient number, since it is larger than the sum of its proper divisors (1).

221220201111229 is an equidigital number, since it uses as much as digits as its factorization.

221220201111229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The spelling of 221220201111229 in words is "two hundred twenty-one trillion, two hundred twenty billion, two hundred one million, one hundred eleven thousand, two hundred twenty-nine".