1221202202103 has 32 divisors (see below), whose sum is σ = 1948426484480. Its totient is φ = 751482165600.

The previous prime is 1221202202053. The next prime is 1221202202123. The reversal of 1221202202103 is 3012022021221.

It is not a de Polignac number, because 1221202202103 - 2⁶ = 1221202202039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221202202123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14842428 + ... + 14924478.

It is an arithmetic number, because the mean of its divisors is an integer number (60888327640).

Almost surely, 2^{1221202202103} is an apocalyptic number.

1221202202103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1221202202103 is a deficient number, since it is larger than the sum of its proper divisors (727224282377).

1221202202103 is a wasteful number, since it uses less digits than its factorization.

1221202202103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124476 (or 124470 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1221202202103 its reverse (3012022021221), we get a palindrome (4233224223324).

The spelling of 1221202202103 in words is "one trillion, two hundred twenty-one billion, two hundred two million, two hundred two thousand, one hundred three".