2220221001601 has 2 divisors, whose sum is σ = 2220221001602. Its totient is φ = 2220221001600.

The previous prime is 2220221001599. The next prime is 2220221001611. The reversal of 2220221001601 is 1061001220222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1911306250000 + 308914751601 = 1382500^2 + 555801^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220221001601 - 2¹ = 2220221001599 is a prime.

Together with 2220221001599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2220221001611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110110500800 + 1110110500801.

It is an arithmetic number, because the mean of its divisors is an integer number (1110110500801).

Almost surely, 2^{2220221001601} is an apocalyptic number.

It is an amenable number.

2220221001601 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220221001601 is an equidigital number, since it uses as much as digits as its factorization.

2220221001601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 2220221001601 its reverse (1061001220222), we get a palindrome (3281222221823).

The spelling of 2220221001601 in words is "two trillion, two hundred twenty billion, two hundred twenty-one million, one thousand, six hundred one".