220726968221 has 2 divisors, whose sum is σ = 220726968222. Its totient is φ = 220726968220.

The previous prime is 220726968179. The next prime is 220726968271. The reversal of 220726968221 is 122869627022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185029022500 + 35697945721 = 430150^2 + 188939^2 .

It is a cyclic number.

It is not a de Polignac number, because 220726968221 - 2⁶ = 220726968157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220726968271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110363484110 + 110363484111.

It is an arithmetic number, because the mean of its divisors is an integer number (110363484111).

Almost surely, 2^220726968221 is an apocalyptic number.

It is an amenable number.

220726968221 is a deficient number, since it is larger than the sum of its proper divisors (1).

220726968221 is an equidigital number, since it uses as much as digits as its factorization.

220726968221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 220726968221 in words is "two hundred twenty billion, seven hundred twenty-six million, nine hundred sixty-eight thousand, two hundred twenty-one".