1220033111321 has 2 divisors, whose sum is σ = 1220033111322. Its totient is φ = 1220033111320.

The previous prime is 1220033111243. The next prime is 1220033111359. The reversal of 1220033111321 is 1231113300221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 642145795600 + 577887315721 = 801340^2 + 760189^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220033111321 - 2²⁶ = 1219966002457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220033111293 and 1220033111302.

It is not a weakly prime, because it can be changed into another prime (1220033111221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610016555660 + 610016555661.

It is an arithmetic number, because the mean of its divisors is an integer number (610016555661).

Almost surely, 2^{1220033111321} is an apocalyptic number.

It is an amenable number.

1220033111321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220033111321 is an equidigital number, since it uses as much as digits as its factorization.

1220033111321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1220033111321 its reverse (1231113300221), we get a palindrome (2451146411542).

The spelling of 1220033111321 in words is "one trillion, two hundred twenty billion, thirty-three million, one hundred eleven thousand, three hundred twenty-one".