1220102212321 has 2 divisors, whose sum is σ = 1220102212322. Its totient is φ = 1220102212320.

The previous prime is 1220102212253. The next prime is 1220102212337. The reversal of 1220102212321 is 1232122010221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1115167680225 + 104934532096 = 1056015^2 + 323936^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220102212321 - 2²⁵ = 1220068657889 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220102212421) 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 as a sum of consecutive naturals, namely, 610051106160 + 610051106161.

It is an arithmetic number, because the mean of its divisors is an integer number (610051106161).

Almost surely, 2^{1220102212321} is an apocalyptic number.

It is an amenable number.

1220102212321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220102212321 is an equidigital number, since it uses as much as digits as its factorization.

1220102212321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1220102212321 its reverse (1232122010221), we get a palindrome (2452224222542).

The spelling of 1220102212321 in words is "one trillion, two hundred twenty billion, one hundred two million, two hundred twelve thousand, three hundred twenty-one".