1220313321923 has 2 divisors, whose sum is σ = 1220313321924. Its totient is φ = 1220313321922.

The previous prime is 1220313321901. The next prime is 1220313321961. The reversal of 1220313321923 is 3291233130221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220313321923 - 2⁶ = 1220313321859 is a prime.

It is a super-4 number, since 4×1220313321923⁴ (a number of 49 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1220313321923.

It is not a weakly prime, because it can be changed into another prime (1220313321223) 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, 610156660961 + 610156660962.

It is an arithmetic number, because the mean of its divisors is an integer number (610156660962).

Almost surely, 2^{1220313321923} is an apocalyptic number.

1220313321923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220313321923 is an equidigital number, since it uses as much as digits as its factorization.

1220313321923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 32.

The spelling of 1220313321923 in words is "one trillion, two hundred twenty billion, three hundred thirteen million, three hundred twenty-one thousand, nine hundred twenty-three".