1221303213203 has 8 divisors (see below), whose sum is σ = 1247399729472. Its totient is φ = 1195211336256.

The previous prime is 1221303213107. The next prime is 1221303213227. The reversal of 1221303213203 is 3023123031221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221303213203 - 2¹² = 1221303209107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221303213503) 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 7 ways as a sum of consecutive naturals, for example, 625100 + ... + 1683257.

It is an arithmetic number, because the mean of its divisors is an integer number (155924966184).

Almost surely, 2^{1221303213203} is an apocalyptic number.

1221303213203 is a deficient number, since it is larger than the sum of its proper divisors (26096516269).

1221303213203 is a wasteful number, since it uses less digits than its factorization.

1221303213203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319661.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1221303213203 its reverse (3023123031221), we get a palindrome (4244426244424).

It can be divided in two parts, 122130 and 3213203, that added together give a palindrome (3335333).

The spelling of 1221303213203 in words is "one trillion, two hundred twenty-one billion, three hundred three million, two hundred thirteen thousand, two hundred three".