1221420102163 has 2 divisors, whose sum is σ = 1221420102164. Its totient is φ = 1221420102162.

The previous prime is 1221420102157. The next prime is 1221420102247. The reversal of 1221420102163 is 3612010241221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221420102163 - 2⁵ = 1221420102131 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221420172163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610710051081 + 610710051082.

It is an arithmetic number, because the mean of its divisors is an integer number (610710051082).

Almost surely, 2^{1221420102163} is an apocalyptic number.

1221420102163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221420102163 is an equidigital number, since it uses as much as digits as its factorization.

1221420102163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 1221420102163 its reverse (3612010241221), we get a palindrome (4833430343384).

The spelling of 1221420102163 in words is "one trillion, two hundred twenty-one billion, four hundred twenty million, one hundred two thousand, one hundred sixty-three".