2233120121621 has 2 divisors, whose sum is σ = 2233120121622. Its totient is φ = 2233120121620.

The previous prime is 2233120121611. The next prime is 2233120121653. The reversal of 2233120121621 is 1261210213322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1812561386596 + 420558735025 = 1346314^2 + 648505^2 .

It is a cyclic number.

It is not a de Polignac number, because 2233120121621 - 2¹⁰ = 2233120120597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2233120121611) 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, 1116560060810 + 1116560060811.

It is an arithmetic number, because the mean of its divisors is an integer number (1116560060811).

Almost surely, 2^{2233120121621} is an apocalyptic number.

It is an amenable number.

2233120121621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2233120121621 is an equidigital number, since it uses as much as digits as its factorization.

2233120121621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 2233120121621 its reverse (1261210213322), we get a palindrome (3494330334943).

The spelling of 2233120121621 in words is "two trillion, two hundred thirty-three billion, one hundred twenty million, one hundred twenty-one thousand, six hundred twenty-one".