11021020009997 has 2 divisors, whose sum is σ = 11021020009998. Its totient is φ = 11021020009996.

The previous prime is 11021020009931. The next prime is 11021020010023. The reversal of 11021020009997 is 79990002012011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10425026745961 + 595993264036 = 3228781^2 + 772006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11021020009997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11021020009397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510510004998 + 5510510004999.

It is an arithmetic number, because the mean of its divisors is an integer number (5510510004999).

Almost surely, 2^{11021020009997} is an apocalyptic number.

It is an amenable number.

11021020009997 is a deficient number, since it is larger than the sum of its proper divisors (1).

11021020009997 is an equidigital number, since it uses as much as digits as its factorization.

11021020009997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 41.

The spelling of 11021020009997 in words is "eleven trillion, twenty-one billion, twenty million, nine thousand, nine hundred ninety-seven".