1221222002203 has 32 divisors (see below), whose sum is σ = 1437912412160. Its totient is φ = 1015582613760.

The previous prime is 1221222002153. The next prime is 1221222002233. The reversal of 1221222002203 is 3022002221221.

It is a cyclic number.

It is not a de Polignac number, because 1221222002203 - 2¹⁷ = 1221221871131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1221222002233) 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 31 ways as a sum of consecutive naturals, for example, 35841151 + ... + 35875207.

It is an arithmetic number, because the mean of its divisors is an integer number (44934762880).

Almost surely, 2^{1221222002203} is an apocalyptic number.

1221222002203 is a deficient number, since it is larger than the sum of its proper divisors (216690409957).

1221222002203 is a wasteful number, since it uses less digits than its factorization.

1221222002203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35267.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 1221222002203 its reverse (3022002221221), we get a palindrome (4243224223424).

The spelling of 1221222002203 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-two million, two thousand, two hundred three".