110212021021 has 4 divisors (see below), whose sum is σ = 110524236732. Its totient is φ = 109899805312.

The previous prime is 110212021009. The next prime is 110212021033. The reversal of 110212021021 is 120120212011.

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

It is an interprime number because it is at equal distance from previous prime (110212021009) and next prime (110212021033).

It can be written as a sum of positive squares in 2 ways, for example, as 19785516921 + 90426504100 = 140661^2 + 300710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110212021021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110212020992 and 110212021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110212021001) 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, 156107326 + ... + 156108031.

It is an arithmetic number, because the mean of its divisors is an integer number (27631059183).

Almost surely, 2^110212021021 is an apocalyptic number.

It is an amenable number.

110212021021 is a deficient number, since it is larger than the sum of its proper divisors (312215711).

110212021021 is an equidigital number, since it uses as much as digits as its factorization.

110212021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312215710.

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

Adding to 110212021021 its reverse (120120212011), we get a palindrome (230332233032).

The spelling of 110212021021 in words is "one hundred ten billion, two hundred twelve million, twenty-one thousand, twenty-one".