1221031332233 has 2 divisors, whose sum is σ = 1221031332234. Its totient is φ = 1221031332232.

The previous prime is 1221031332217. The next prime is 1221031332319. The reversal of 1221031332233 is 3322331301221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1179934717504 + 41096614729 = 1086248^2 + 202723^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221031332233 - 2⁴ = 1221031332217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1221031332733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610515666116 + 610515666117.

It is an arithmetic number, because the mean of its divisors is an integer number (610515666117).

Almost surely, 2^{1221031332233} is an apocalyptic number.

It is an amenable number.

1221031332233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221031332233 is an equidigital number, since it uses as much as digits as its factorization.

1221031332233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 1221031332233 its reverse (3322331301221), we get a palindrome (4543362633454).

The spelling of 1221031332233 in words is "one trillion, two hundred twenty-one billion, thirty-one million, three hundred thirty-two thousand, two hundred thirty-three".