110021212121 has 8 divisors (see below), whose sum is σ = 110267027400. Its totient is φ = 109775554560.

The previous prime is 110021212087. The next prime is 110021212123. The reversal of 110021212121 is 121212120011.

It can be written as a sum of positive squares in 4 ways, for example, as 19061668096 + 90959544025 = 138064^2 + 301595^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110021212121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110021212096 and 110021212105.

It is not an unprimeable number, because it can be changed into a prime (110021212123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1416935 + ... + 1492563.

It is an arithmetic number, because the mean of its divisors is an integer number (13783378425).

Almost surely, 2^110021212121 is an apocalyptic number.

It is an amenable number.

110021212121 is a deficient number, since it is larger than the sum of its proper divisors (245815279).

110021212121 is an equidigital number, since it uses as much as digits as its factorization.

110021212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78859.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 110021212121 its reverse (121212120011), we get a palindrome (231233332132).

The spelling of 110021212121 in words is "one hundred ten billion, twenty-one million, two hundred twelve thousand, one hundred twenty-one".