1220326663361 has 8 divisors (see below), whose sum is σ = 1314207798120. Its totient is φ = 1126446936192.

The previous prime is 1220326663331. The next prime is 1220326663363. The reversal of 1220326663361 is 1633666230221.

It can be written as a sum of positive squares in 4 ways, for example, as 456198930625 + 764127732736 = 675425^2 + 874144^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220326663361 - 2²² = 1220322469057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220326663363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2062085 + ... + 2587053.

It is an arithmetic number, because the mean of its divisors is an integer number (164275974765).

Almost surely, 2^{1220326663361} is an apocalyptic number.

It is an amenable number.

1220326663361 is a deficient number, since it is larger than the sum of its proper divisors (93881134759).

1220326663361 is a wasteful number, since it uses less digits than its factorization.

1220326663361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703795.

The product of its (nonzero) digits is 279936, while the sum is 41.

The spelling of 1220326663361 in words is "one trillion, two hundred twenty billion, three hundred twenty-six million, six hundred sixty-three thousand, three hundred sixty-one".