110101201120021 has 4 divisors (see below), whose sum is σ = 111111303882700. Its totient is φ = 109091098357344.

The previous prime is 110101201120003. The next prime is 110101201120037. The reversal of 110101201120021 is 120021102101011.

It is a happy number.

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 68848340300100 + 41252860819921 = 8297490^2 + 6422839^2 .

It is a cyclic number.

It is not a de Polignac number, because 110101201120021 - 2⁹ = 110101201119509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110101201119983 and 110101201120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110101201130021) 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, 505051381176 + ... + 505051381393.

It is an arithmetic number, because the mean of its divisors is an integer number (27777825970675).

Almost surely, 2^{110101201120021} is an apocalyptic number.

It is an amenable number.

110101201120021 is a deficient number, since it is larger than the sum of its proper divisors (1010102762679).

110101201120021 is a wasteful number, since it uses less digits than its factorization.

110101201120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010102762678.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 110101201120021 its reverse (120021102101011), we get a palindrome (230122303221032).

The spelling of 110101201120021 in words is "one hundred ten trillion, one hundred one billion, two hundred one million, one hundred twenty thousand, twenty-one".