110001211111021 has 2 divisors, whose sum is σ = 110001211111022. Its totient is φ = 110001211111020.

The previous prime is 110001211111009. The next prime is 110001211111037. The reversal of 110001211111021 is 120111112100011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69559102844100 + 40442108266921 = 8340210^2 + 6359411^2 .

It is an emirp because it is prime and its reverse (120111112100011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 110001211111021 - 2¹⁷ = 110001210979949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 110001211110992 and 110001211111010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110001211111321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55000605555510 + 55000605555511.

It is an arithmetic number, because the mean of its divisors is an integer number (55000605555511).

Almost surely, 2^{110001211111021} is an apocalyptic number.

It is an amenable number.

110001211111021 is a deficient number, since it is larger than the sum of its proper divisors (1).

110001211111021 is an equidigital number, since it uses as much as digits as its factorization.

110001211111021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 110001211111021 its reverse (120111112100011), we get a palindrome (230112323211032).

The spelling of 110001211111021 in words is "one hundred ten trillion, one billion, two hundred eleven million, one hundred eleven thousand, twenty-one".