110202021220021 has 2 divisors, whose sum is σ = 110202021220022. Its totient is φ = 110202021220020.

The previous prime is 110202021219971. The next prime is 110202021220087. The reversal of 110202021220021 is 120022120202011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55970373382225 + 54231647837796 = 7481335^2 + 7364214^2 .

It is a cyclic number.

It is not a de Polignac number, because 110202021220021 - 2²⁵ = 110201987665589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 110202021219977 and 110202021220004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110202021220321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55101010610010 + 55101010610011.

It is an arithmetic number, because the mean of its divisors is an integer number (55101010610011).

Almost surely, 2^{110202021220021} is an apocalyptic number.

It is an amenable number.

110202021220021 is a deficient number, since it is larger than the sum of its proper divisors (1).

110202021220021 is an equidigital number, since it uses as much as digits as its factorization.

110202021220021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 110202021220021 its reverse (120022120202011), we get a palindrome (230224141422032).

The spelling of 110202021220021 in words is "one hundred ten trillion, two hundred two billion, twenty-one million, two hundred twenty thousand, twenty-one".