11012101021 has 2 divisors, whose sum is σ = 11012101022. Its totient is φ = 11012101020.

The previous prime is 11012101019. The next prime is 11012101057. The reversal of 11012101021 is 12010121011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8852175396 + 2159925625 = 94086^2 + 46475^2 .

It is a cyclic number.

It is not a de Polignac number, because 11012101021 - 2¹ = 11012101019 is a prime.

Together with 11012101019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 11012100989 and 11012101007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11012101091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5506050510 + 5506050511.

It is an arithmetic number, because the mean of its divisors is an integer number (5506050511).

Almost surely, 2^11012101021 is an apocalyptic number.

It is an amenable number.

11012101021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11012101021 is an equidigital number, since it uses as much as digits as its factorization.

11012101021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11012101021 its reverse (12010121011), we get a palindrome (23022222032).

The spelling of 11012101021 in words is "eleven billion, twelve million, one hundred one thousand, twenty-one".