2221131301777 has 2 divisors, whose sum is σ = 2221131301778. Its totient is φ = 2221131301776.

The previous prime is 2221131301709. The next prime is 2221131301789. The reversal of 2221131301777 is 7771031311222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2025410002561 + 195721299216 = 1423169^2 + 442404^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2221131301777 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221131305777) 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, 1110565650888 + 1110565650889.

It is an arithmetic number, because the mean of its divisors is an integer number (1110565650889).

Almost surely, 2^{2221131301777} is an apocalyptic number.

It is an amenable number.

2221131301777 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221131301777 is an equidigital number, since it uses as much as digits as its factorization.

2221131301777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24696, while the sum is 37.

Adding to 2221131301777 its reverse (7771031311222), we get a palindrome (9992162612999).

The spelling of 2221131301777 in words is "two trillion, two hundred twenty-one billion, one hundred thirty-one million, three hundred one thousand, seven hundred seventy-seven".