110211111100021 has 2 divisors, whose sum is σ = 110211111100022. Its totient is φ = 110211111100020.

The previous prime is 110211111099983. The next prime is 110211111100031. The reversal of 110211111100021 is 120001111112011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93273680308900 + 16937430791121 = 9657830^2 + 4115511^2 .

It is a cyclic number.

It is not a de Polignac number, because 110211111100021 - 2¹⁷ = 110211110968949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 110211111099974 and 110211111100010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110211111100031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55105555550010 + 55105555550011.

It is an arithmetic number, because the mean of its divisors is an integer number (55105555550011).

Almost surely, 2^{110211111100021} is an apocalyptic number.

It is an amenable number.

110211111100021 is a deficient number, since it is larger than the sum of its proper divisors (1).

110211111100021 is an equidigital number, since it uses as much as digits as its factorization.

110211111100021 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 110211111100021 its reverse (120001111112011), we get a palindrome (230212222212032).

The spelling of 110211111100021 in words is "one hundred ten trillion, two hundred eleven billion, one hundred eleven million, one hundred thousand, twenty-one".