221111201001701 has 2 divisors, whose sum is σ = 221111201001702. Its totient is φ = 221111201001700.

The previous prime is 221111201001679. The next prime is 221111201001707. The reversal of 221111201001701 is 107100102111122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206381525020225 + 14729675981476 = 14365985^2 + 3837926^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221111201001701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221111201001707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110555600500850 + 110555600500851.

It is an arithmetic number, because the mean of its divisors is an integer number (110555600500851).

Almost surely, 2^{221111201001701} is an apocalyptic number.

It is an amenable number.

221111201001701 is a deficient number, since it is larger than the sum of its proper divisors (1).

221111201001701 is an equidigital number, since it uses as much as digits as its factorization.

221111201001701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 20.

Adding to 221111201001701 its reverse (107100102111122), we get a palindrome (328211303112823).

The spelling of 221111201001701 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred one million, one thousand, seven hundred one".