1100210021021 has 2 divisors, whose sum is σ = 1100210021022. Its totient is φ = 1100210021020.

The previous prime is 1100210020991. The next prime is 1100210021063. The reversal of 1100210021021 is 1201200120011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 948822105625 + 151387915396 = 974075^2 + 389086^2 .

It is an emirp because it is prime and its reverse (1201200120011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1100210021021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1100210020993 and 1100210021011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100210021221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550105010510 + 550105010511.

It is an arithmetic number, because the mean of its divisors is an integer number (550105010511).

Almost surely, 2^{1100210021021} is an apocalyptic number.

It is an amenable number.

1100210021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100210021021 is an equidigital number, since it uses as much as digits as its factorization.

1100210021021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1100210021021 its reverse (1201200120011), we get a palindrome (2301410141032).

The spelling of 1100210021021 in words is "one trillion, one hundred billion, two hundred ten million, twenty-one thousand, twenty-one".