1221032320103 has 2 divisors, whose sum is σ = 1221032320104. Its totient is φ = 1221032320102.

The previous prime is 1221032320099. The next prime is 1221032320117. The reversal of 1221032320103 is 3010232301221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1221032320103 - 2² = 1221032320099 is a prime.

It is a super-2 number, since 2×1221032320103² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221032320153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610516160051 + 610516160052.

It is an arithmetic number, because the mean of its divisors is an integer number (610516160052).

Almost surely, 2^{1221032320103} is an apocalyptic number.

1221032320103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221032320103 is an equidigital number, since it uses as much as digits as its factorization.

1221032320103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1221032320103 its reverse (3010232301221), we get a palindrome (4231264621324).

The spelling of 1221032320103 in words is "one trillion, two hundred twenty-one billion, thirty-two million, three hundred twenty thousand, one hundred three".