221020112120201 has 2 divisors, whose sum is σ = 221020112120202. Its totient is φ = 221020112120200.

The previous prime is 221020112120167. The next prime is 221020112120219. The reversal of 221020112120201 is 102021211020122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161431763136400 + 59588348983801 = 12705580^2 + 7719349^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221020112120201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221020112120201.

It is not a weakly prime, because it can be changed into another prime (221020112120231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510056060100 + 110510056060101.

It is an arithmetic number, because the mean of its divisors is an integer number (110510056060101).

Almost surely, 2^{221020112120201} is an apocalyptic number.

It is an amenable number.

221020112120201 is a deficient number, since it is larger than the sum of its proper divisors (1).

221020112120201 is an equidigital number, since it uses as much as digits as its factorization.

221020112120201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221020112120201 its reverse (102021211020122), we get a palindrome (323041323140323).

The spelling of 221020112120201 in words is "two hundred twenty-one trillion, twenty billion, one hundred twelve million, one hundred twenty thousand, two hundred one".