110021211221 has 2 divisors, whose sum is σ = 110021211222. Its totient is φ = 110021211220.

The previous prime is 110021211203. The next prime is 110021211241. The reversal of 110021211221 is 122112120011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108495136996 + 1526074225 = 329386^2 + 39065^2 .

It is a cyclic number.

It is not a de Polignac number, because 110021211221 - 2¹⁴ = 110021194837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 110021211196 and 110021211205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110021211241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55010605610 + 55010605611.

It is an arithmetic number, because the mean of its divisors is an integer number (55010605611).

Almost surely, 2^110021211221 is an apocalyptic number.

It is an amenable number.

110021211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

110021211221 is an equidigital number, since it uses as much as digits as its factorization.

110021211221 is an evil number, because the sum of its binary digits is even.

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

Adding to 110021211221 its reverse (122112120011), we get a palindrome (232133331232).

The spelling of 110021211221 in words is "one hundred ten billion, twenty-one million, two hundred eleven thousand, two hundred twenty-one".