11222221210957 has 2 divisors, whose sum is σ = 11222221210958. Its totient is φ = 11222221210956.

The previous prime is 11222221210931. The next prime is 11222221210987. The reversal of 11222221210957 is 75901212222211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10348484212836 + 873736998121 = 3216906^2 + 934739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11222221210957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11222221210987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5611110605478 + 5611110605479.

It is an arithmetic number, because the mean of its divisors is an integer number (5611110605479).

Almost surely, 2^{11222221210957} is an apocalyptic number.

It is an amenable number.

11222221210957 is a deficient number, since it is larger than the sum of its proper divisors (1).

11222221210957 is an equidigital number, since it uses as much as digits as its factorization.

11222221210957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 37.

The spelling of 11222221210957 in words is "eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred ten thousand, nine hundred fifty-seven".