1221222168403 has 2 divisors, whose sum is σ = 1221222168404. Its totient is φ = 1221222168402.

The previous prime is 1221222168371. The next prime is 1221222168409. The reversal of 1221222168403 is 3048612221221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221222168403 - 2⁵ = 1221222168371 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221222168409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610611084201 + 610611084202.

It is an arithmetic number, because the mean of its divisors is an integer number (610611084202).

Almost surely, 2^{1221222168403} is an apocalyptic number.

1221222168403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221222168403 is an equidigital number, since it uses as much as digits as its factorization.

1221222168403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 34.

Adding to 1221222168403 its reverse (3048612221221), we get a palindrome (4269834389624).

The spelling of 1221222168403 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-two million, one hundred sixty-eight thousand, four hundred three".