110021111021 has 4 divisors (see below), whose sum is σ = 110053732572. Its totient is φ = 109988489472.

The previous prime is 110021110951. The next prime is 110021111033. The reversal of 110021111021 is 120111120011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120111120011 = 29 ⋅4141762759.

It can be written as a sum of positive squares in 2 ways, for example, as 96329536900 + 13691574121 = 310370^2 + 117011^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110021111021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110021110993 and 110021111011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110021111821) 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, 16305716 + ... + 16312461.

It is an arithmetic number, because the mean of its divisors is an integer number (27513433143).

Almost surely, 2^110021111021 is an apocalyptic number.

It is an amenable number.

110021111021 is a deficient number, since it is larger than the sum of its proper divisors (32621551).

110021111021 is an equidigital number, since it uses as much as digits as its factorization.

110021111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32621550.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 110021111021 its reverse (120111120011), we get a palindrome (230132231032).

The spelling of 110021111021 in words is "one hundred ten billion, twenty-one million, one hundred eleven thousand, twenty-one".