221120222220077 has 2 divisors, whose sum is σ = 221120222220078. Its totient is φ = 221120222220076.

The previous prime is 221120222220061. The next prime is 221120222220091. The reversal of 221120222220077 is 770022222021122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219960607682761 + 1159614537316 = 14831069^2 + 1076854^2 .

It is a cyclic number.

It is not a de Polignac number, because 221120222220077 - 2⁴ = 221120222220061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221120222220377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560111110038 + 110560111110039.

It is an arithmetic number, because the mean of its divisors is an integer number (110560111110039).

Almost surely, 2^{221120222220077} is an apocalyptic number.

It is an amenable number.

221120222220077 is a deficient number, since it is larger than the sum of its proper divisors (1).

221120222220077 is an equidigital number, since it uses as much as digits as its factorization.

221120222220077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12544, while the sum is 32.

Adding to 221120222220077 its reverse (770022222021122), we get a palindrome (991142444241199).

The spelling of 221120222220077 in words is "two hundred twenty-one trillion, one hundred twenty billion, two hundred twenty-two million, two hundred twenty thousand, seventy-seven".