1212221122403 has 8 divisors (see below), whose sum is σ = 1227302566176. Its totient is φ = 1197232488000.

The previous prime is 1212221122309. The next prime is 1212221122423. The reversal of 1212221122403 is 3042211222121.

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 1212221122403 - 2³⁶ = 1143501645667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212221122423) 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, 23176058 + ... + 23228303.

It is an arithmetic number, because the mean of its divisors is an integer number (153412820772).

Almost surely, 2^{1212221122403} is an apocalyptic number.

1212221122403 is a deficient number, since it is larger than the sum of its proper divisors (15081443773).

1212221122403 is a wasteful number, since it uses less digits than its factorization.

1212221122403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46404685.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1212221122403 its reverse (3042211222121), we get a palindrome (4254432344524).

The spelling of 1212221122403 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, one hundred twenty-two thousand, four hundred three".