110121021 has 12 divisors (see below), whose sum is σ = 164195200. Its totient is φ = 71045640.

The previous prime is 110120977. The next prime is 110121031. The reversal of 110121021 is 120121011.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-110121021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110120994 and 110121012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110121031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 197071 + ... + 197628.

Almost surely, 2^110121021 is an apocalyptic number.

It is an amenable number.

110121021 is a deficient number, since it is larger than the sum of its proper divisors (54074179).

110121021 is a wasteful number, since it uses less digits than its factorization.

110121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394736 (or 394733 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 110121021 is about 10493.8563455004. The cubic root of 110121021 is about 479.3176371909.

Adding to 110121021 its reverse (120121011), we get a palindrome (230242032).

It can be divided in two parts, 1101 and 21021, that added together give a palindrome (22122).

The spelling of 110121021 in words is "one hundred ten million, one hundred twenty-one thousand, twenty-one".