11220221209957 has 2 divisors, whose sum is σ = 11220221209958. Its totient is φ = 11220221209956.

The previous prime is 11220221209931. The next prime is 11220221210047. The reversal of 11220221209957 is 75990212202211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11155392920961 + 64828288996 = 3339969^2 + 254614^2 .

It is a cyclic number.

It is not a de Polignac number, because 11220221209957 - 2⁷ = 11220221209829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11220221209927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610110604978 + 5610110604979.

It is an arithmetic number, because the mean of its divisors is an integer number (5610110604979).

Almost surely, 2^{11220221209957} is an apocalyptic number.

It is an amenable number.

11220221209957 is a deficient number, since it is larger than the sum of its proper divisors (1).

11220221209957 is an equidigital number, since it uses as much as digits as its factorization.

11220221209957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 11220221209957 in words is "eleven trillion, two hundred twenty billion, two hundred twenty-one million, two hundred nine thousand, nine hundred fifty-seven".