1100100010021 has 2 divisors, whose sum is σ = 1100100010022. Its totient is φ = 1100100010020.

The previous prime is 1100100010003. The next prime is 1100100010027. The reversal of 1100100010021 is 1200100010011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 930673101796 + 169426908225 = 964714^2 + 411615^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100100010021 - 2¹³ = 1100100001829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1100100009986 and 1100100010013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100100010027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550050005010 + 550050005011.

It is an arithmetic number, because the mean of its divisors is an integer number (550050005011).

Almost surely, 2^{1100100010021} is an apocalyptic number.

It is an amenable number.

1100100010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100100010021 is an equidigital number, since it uses as much as digits as its factorization.

1100100010021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 1100100010021 its reverse (1200100010011), we get a palindrome (2300200020032).

The spelling of 1100100010021 in words is "one trillion, one hundred billion, one hundred million, ten thousand, twenty-one".