220678954901 has 2 divisors, whose sum is σ = 220678954902. Its totient is φ = 220678954900.

The previous prime is 220678954883. The next prime is 220678954921. The reversal of 220678954901 is 109459876022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151222987876 + 69455967025 = 388874^2 + 263545^2 .

It is a cyclic number.

It is not a de Polignac number, because 220678954901 - 2³⁰ = 219605213077 is a prime.

It is a super-2 number, since 2×220678954901² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220678954921) 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, 110339477450 + 110339477451.

It is an arithmetic number, because the mean of its divisors is an integer number (110339477451).

Almost surely, 2^220678954901 is an apocalyptic number.

It is an amenable number.

220678954901 is a deficient number, since it is larger than the sum of its proper divisors (1).

220678954901 is an equidigital number, since it uses as much as digits as its factorization.

220678954901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 220678954901 in words is "two hundred twenty billion, six hundred seventy-eight million, nine hundred fifty-four thousand, nine hundred one".