220021119977 has 2 divisors, whose sum is σ = 220021119978. Its totient is φ = 220021119976.

The previous prime is 220021119949. The next prime is 220021120001. The reversal of 220021119977 is 779911120022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116944164841 + 103076955136 = 341971^2 + 321056^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220021119977 is a prime.

It is not a weakly prime, because it can be changed into another prime (220021119937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110010559988 + 110010559989.

It is an arithmetic number, because the mean of its divisors is an integer number (110010559989).

Almost surely, 2^220021119977 is an apocalyptic number.

It is an amenable number.

220021119977 is a deficient number, since it is larger than the sum of its proper divisors (1).

220021119977 is an equidigital number, since it uses as much as digits as its factorization.

220021119977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 41.

Adding to 220021119977 its reverse (779911120022), we get a palindrome (999932239999).

The spelling of 220021119977 in words is "two hundred twenty billion, twenty-one million, one hundred nineteen thousand, nine hundred seventy-seven".