220212210077 has 2 divisors, whose sum is σ = 220212210078. Its totient is φ = 220212210076.

The previous prime is 220212210067. The next prime is 220212210107. The reversal of 220212210077 is 770012212022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175545078361 + 44667131716 = 418981^2 + 211346^2 .

It is a cyclic number.

It is not a de Polignac number, because 220212210077 - 2⁸ = 220212209821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220212210067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110106105038 + 110106105039.

It is an arithmetic number, because the mean of its divisors is an integer number (110106105039).

Almost surely, 2^220212210077 is an apocalyptic number.

It is an amenable number.

220212210077 is a deficient number, since it is larger than the sum of its proper divisors (1).

220212210077 is an equidigital number, since it uses as much as digits as its factorization.

220212210077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568, while the sum is 26.

Adding to 220212210077 its reverse (770012212022), we get a palindrome (990224422099).

The spelling of 220212210077 in words is "two hundred twenty billion, two hundred twelve million, two hundred ten thousand, seventy-seven".