1220145110321 has 2 divisors, whose sum is σ = 1220145110322. Its totient is φ = 1220145110320.

The previous prime is 1220145110291. The next prime is 1220145110363. The reversal of 1220145110321 is 1230115410221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1159737301921 + 60407808400 = 1076911^2 + 245780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220145110321 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220145110381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610072555160 + 610072555161.

It is an arithmetic number, because the mean of its divisors is an integer number (610072555161).

Almost surely, 2^{1220145110321} is an apocalyptic number.

It is an amenable number.

1220145110321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220145110321 is an equidigital number, since it uses as much as digits as its factorization.

1220145110321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

It can be divided in two parts, 1220 and 145110321, that added together give a palindrome (145111541).

The spelling of 1220145110321 in words is "one trillion, two hundred twenty billion, one hundred forty-five million, one hundred ten thousand, three hundred twenty-one".