110020020000021 has 6 divisors (see below), whose sum is σ = 158917806666710. Its totient is φ = 73346680000008.

The previous prime is 110020020000019. The next prime is 110020020000101. The reversal of 110020020000021 is 120000020020011.

It can be written as a sum of positive squares in only one way, i.e., 90561678632100 + 19458341367921 = 9516390^2 + 4411161^2 .

It is not a de Polignac number, because 110020020000021 - 2¹ = 110020020000019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 12224446666669 = 110020020000021 / (1 + 1 + 0 + 0 + 2 + 0 + 0 + 2 + 0 + 0 + 0 + 0 + 0 + 2 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110020019999958 and 110020020000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110020020000221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6112223333326 + ... + 6112223333343.

Almost surely, 2^{110020020000021} is an apocalyptic number.

It is an amenable number.

110020020000021 is a deficient number, since it is larger than the sum of its proper divisors (48897786666689).

110020020000021 is a wasteful number, since it uses less digits than its factorization.

110020020000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12224446666675 (or 12224446666672 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 110020020000021 its reverse (120000020020011), we get a palindrome (230020040020032).

The spelling of 110020020000021 in words is "one hundred ten trillion, twenty billion, twenty million, twenty-one", and thus it is an aban number.