1100010021221 has 2 divisors, whose sum is σ = 1100010021222. Its totient is φ = 1100010021220.

The previous prime is 1100010021211. The next prime is 1100010021283. The reversal of 1100010021221 is 1221200100011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1081830892321 + 18179128900 = 1040111^2 + 134830^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100010021221 - 2¹⁸ = 1100009759077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100010021211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550005010610 + 550005010611.

It is an arithmetic number, because the mean of its divisors is an integer number (550005010611).

Almost surely, 2^{1100010021221} is an apocalyptic number.

It is an amenable number.

1100010021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100010021221 is an equidigital number, since it uses as much as digits as its factorization.

1100010021221 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1100010021221 its reverse (1221200100011), we get a palindrome (2321210121232).

The spelling of 1100010021221 in words is "one trillion, one hundred billion, ten million, twenty-one thousand, two hundred twenty-one".