1220134310221 has 4 divisors (see below), whose sum is σ = 1220156397244. Its totient is φ = 1220112223200.

The previous prime is 1220134310203. The next prime is 1220134310249.

1220134310221 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1124352726025 + 95781584196 = 1060355^2 + 309486^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220134310221 - 2¹³ = 1220134302029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220134310192 and 1220134310201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220134314221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10960440 + ... + 11071201.

It is an arithmetic number, because the mean of its divisors is an integer number (305039099311).

Almost surely, 2^{1220134310221} is an apocalyptic number.

It is an amenable number.

1220134310221 is a deficient number, since it is larger than the sum of its proper divisors (22087023).

1220134310221 is an equidigital number, since it uses as much as digits as its factorization.

1220134310221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22087022.

The product of its (nonzero) digits is 576, while the sum is 22.

The spelling of 1220134310221 in words is "one trillion, two hundred twenty billion, one hundred thirty-four million, three hundred ten thousand, two hundred twenty-one".