110202221120021 has 4 divisors (see below), whose sum is σ = 110231244621612. Its totient is φ = 110173197618432.

The previous prime is 110202221119967. The next prime is 110202221120053. The reversal of 110202221120021 is 120021122202011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42932451825796 + 67269769294225 = 6552286^2 + 8201815^2 .

It is a cyclic number.

It is not a de Polignac number, because 110202221120021 - 2³⁰ = 110201147378197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110202221120221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14511745100 + ... + 14511752693.

It is an arithmetic number, because the mean of its divisors is an integer number (27557811155403).

Almost surely, 2^{110202221120021} is an apocalyptic number.

It is an amenable number.

110202221120021 is a deficient number, since it is larger than the sum of its proper divisors (29023501591).

110202221120021 is an equidigital number, since it uses as much as digits as its factorization.

110202221120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29023501590.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 110202221120021 its reverse (120021122202011), we get a palindrome (230223343322032).

The spelling of 110202221120021 in words is "one hundred ten trillion, two hundred two billion, two hundred twenty-one million, one hundred twenty thousand, twenty-one".