221212023042001 has 2 divisors, whose sum is σ = 221212023042002. Its totient is φ = 221212023042000.

The previous prime is 221212023041963. The next prime is 221212023042019. The reversal of 221212023042001 is 100240320212122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184546818209601 + 36665204832400 = 13584801^2 + 6055180^2 .

It is a cyclic number.

It is not a de Polignac number, because 221212023042001 - 2⁷ = 221212023041873 is a prime.

It is not a weakly prime, because it can be changed into another prime (221212023052001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110606011521000 + 110606011521001.

It is an arithmetic number, because the mean of its divisors is an integer number (110606011521001).

Almost surely, 2^{221212023042001} is an apocalyptic number.

It is an amenable number.

221212023042001 is a deficient number, since it is larger than the sum of its proper divisors (1).

221212023042001 is an equidigital number, since it uses as much as digits as its factorization.

221212023042001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 221212023042001 its reverse (100240320212122), we get a palindrome (321452343254123).

The spelling of 221212023042001 in words is "two hundred twenty-one trillion, two hundred twelve billion, twenty-three million, forty-two thousand, one".