11000012021 has 2 divisors, whose sum is σ = 11000012022. Its totient is φ = 11000012020.

The previous prime is 11000012017. The next prime is 11000012029. The reversal of 11000012021 is 12021000011.

It is an a-pointer prime, because the next prime (11000012029) can be obtained adding 11000012021 to its sum of digits (8).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6472202500 + 4527809521 = 80450^2 + 67289^2 .

It is a cyclic number.

It is not a de Polignac number, because 11000012021 - 2² = 11000012017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11000012029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500006010 + 5500006011.

It is an arithmetic number, because the mean of its divisors is an integer number (5500006011).

Almost surely, 2^11000012021 is an apocalyptic number.

It is an amenable number.

11000012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11000012021 is an equidigital number, since it uses as much as digits as its factorization.

11000012021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 11000012021 its reverse (12021000011), we get a palindrome (23021012032).

The spelling of 11000012021 in words is "eleven billion, twelve thousand, twenty-one".