1101002121221 has 2 divisors, whose sum is σ = 1101002121222. Its totient is φ = 1101002121220.

The previous prime is 1101002121137. The next prime is 1101002121253. The reversal of 1101002121221 is 1221212001011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1010801008996 + 90201112225 = 1005386^2 + 300335^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101002121221 - 2¹⁴ = 1101002104837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1101002121196 and 1101002121205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101002121421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550501060610 + 550501060611.

It is an arithmetic number, because the mean of its divisors is an integer number (550501060611).

Almost surely, 2^{1101002121221} is an apocalyptic number.

It is an amenable number.

1101002121221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101002121221 is an equidigital number, since it uses as much as digits as its factorization.

1101002121221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1101002121221 its reverse (1221212001011), we get a palindrome (2322214122232).

The spelling of 1101002121221 in words is "one trillion, one hundred one billion, two million, one hundred twenty-one thousand, two hundred twenty-one".