110212121 has 2 divisors, whose sum is σ = 110212122. Its totient is φ = 110212120.

The previous prime is 110212117. The next prime is 110212147. The reversal of 110212121 is 121212011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104755225 + 5456896 = 10235^2 + 2336^2 .

It is a cyclic number.

It is not a de Polignac number, because 110212121 - 2² = 110212117 is a prime.

It is not a weakly prime, because it can be changed into another prime (110212181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55106060 + 55106061.

It is an arithmetic number, because the mean of its divisors is an integer number (55106061).

Almost surely, 2^110212121 is an apocalyptic number.

It is an amenable number.

110212121 is a deficient number, since it is larger than the sum of its proper divisors (1).

110212121 is an equidigital number, since it uses as much as digits as its factorization.

110212121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 110212121 is about 10498.1960831373. The cubic root of 110212121 is about 479.4497760587.

Adding to 110212121 its reverse (121212011), we get a palindrome (231424132).

The spelling of 110212121 in words is "one hundred ten million, two hundred twelve thousand, one hundred twenty-one".