2001220101233 has 2 divisors, whose sum is σ = 2001220101234. Its totient is φ = 2001220101232.

The previous prime is 2001220101217. The next prime is 2001220101281. The reversal of 2001220101233 is 3321010221002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1568187666529 + 433032434704 = 1252273^2 + 658052^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001220101233 - 2⁴ = 2001220101217 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001220101833) 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 as a sum of consecutive naturals, namely, 1000610050616 + 1000610050617.

It is an arithmetic number, because the mean of its divisors is an integer number (1000610050617).

Almost surely, 2^{2001220101233} is an apocalyptic number.

It is an amenable number.

2001220101233 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001220101233 is an equidigital number, since it uses as much as digits as its factorization.

2001220101233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 2001220101233 its reverse (3321010221002), we get a palindrome (5322230322235).

The spelling of 2001220101233 in words is "two trillion, one billion, two hundred twenty million, one hundred one thousand, two hundred thirty-three".