221020212010159 has 2 divisors, whose sum is σ = 221020212010160. Its totient is φ = 221020212010158.

The previous prime is 221020212010151. The next prime is 221020212010249. The reversal of 221020212010159 is 951010212020122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221020212010159 - 2³ = 221020212010151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221020212010151) 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, 110510106005079 + 110510106005080.

It is an arithmetic number, because the mean of its divisors is an integer number (110510106005080).

Almost surely, 2^{221020212010159} is an apocalyptic number.

221020212010159 is a deficient number, since it is larger than the sum of its proper divisors (1).

221020212010159 is an equidigital number, since it uses as much as digits as its factorization.

221020212010159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The spelling of 221020212010159 in words is "two hundred twenty-one trillion, twenty billion, two hundred twelve million, ten thousand, one hundred fifty-nine".