110021102020021 has 4 divisors (see below), whose sum is σ = 110021167380492. Its totient is φ = 110021036659552.

The previous prime is 110021102019977. The next prime is 110021102020061. The reversal of 110021102020021 is 120020201120011.

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 21768887129796 + 88252214890225 = 4665714^2 + 9394265^2 .

It is a cyclic number.

It is not a de Polignac number, because 110021102020021 - 2²³ = 110021093631413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110021102019983 and 110021102020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110021102020061) 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, 30086680 + ... + 33544753.

It is an arithmetic number, because the mean of its divisors is an integer number (27505291845123).

Almost surely, 2^{110021102020021} is an apocalyptic number.

It is an amenable number.

110021102020021 is a deficient number, since it is larger than the sum of its proper divisors (65360471).

110021102020021 is an equidigital number, since it uses as much as digits as its factorization.

110021102020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65360470.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 110021102020021 its reverse (120020201120011), we get a palindrome (230041303140032).

The spelling of 110021102020021 in words is "one hundred ten trillion, twenty-one billion, one hundred two million, twenty thousand, twenty-one".