1221131003103 has 64 divisors (see below), whose sum is σ = 2026583285760. Its totient is φ = 720311810400.

The previous prime is 1221131003087. The next prime is 1221131003117. The reversal of 1221131003103 is 3013001311221.

1221131003103 is a `hidden beast` number, since 1 + 221 + 131 + 0 + 0 + 310 + 3 = 666.

It is not a de Polignac number, because 1221131003103 - 2⁴ = 1221131003087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221131003303) 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 in 63 ways as a sum of consecutive naturals, for example, 3445258 + ... + 3783128.

It is an arithmetic number, because the mean of its divisors is an integer number (31665363840).

Almost surely, 2^{1221131003103} is an apocalyptic number.

1221131003103 is a deficient number, since it is larger than the sum of its proper divisors (805452282657).

1221131003103 is a wasteful number, since it uses less digits than its factorization.

1221131003103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338217 (or 338211 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 1221131003103 its reverse (3013001311221), we get a palindrome (4234132314324).

The spelling of 1221131003103 in words is "one trillion, two hundred twenty-one billion, one hundred thirty-one million, three thousand, one hundred three".