1221220010103 has 16 divisors (see below), whose sum is σ = 1681643767680. Its totient is φ = 787717318176.

The previous prime is 1221220010089. The next prime is 1221220010147. The reversal of 1221220010103 is 3010100221221.

It is not a de Polignac number, because 1221220010103 - 2²¹ = 1221217912951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221220010173) 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 15 ways as a sum of consecutive naturals, for example, 30711925 + ... + 30751662.

It is an arithmetic number, because the mean of its divisors is an integer number (105102735480).

Almost surely, 2^{1221220010103} is an apocalyptic number.

1221220010103 is a deficient number, since it is larger than the sum of its proper divisors (460423757577).

1221220010103 is a wasteful number, since it uses less digits than its factorization.

1221220010103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61463806.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1221220010103 its reverse (3010100221221), we get a palindrome (4231320231324).

The spelling of 1221220010103 in words is "one trillion, two hundred twenty-one billion, two hundred twenty million, ten thousand, one hundred three".