1221300321827 has 2 divisors, whose sum is σ = 1221300321828. Its totient is φ = 1221300321826.

The previous prime is 1221300321823. The next prime is 1221300321841. The reversal of 1221300321827 is 7281230031221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221300321827 - 2² = 1221300321823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221300321793 and 1221300321802.

It is not a weakly prime, because it can be changed into another prime (1221300321821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610650160913 + 610650160914.

It is an arithmetic number, because the mean of its divisors is an integer number (610650160914).

Almost surely, 2^{1221300321827} is an apocalyptic number.

1221300321827 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221300321827 is an equidigital number, since it uses as much as digits as its factorization.

1221300321827 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 1221300321827 in words is "one trillion, two hundred twenty-one billion, three hundred million, three hundred twenty-one thousand, eight hundred twenty-seven".