110402021 has 4 divisors (see below), whose sum is σ = 112485132. Its totient is φ = 108318912.

The previous prime is 110402003. The next prime is 110402051. The reversal of 110402021 is 120204011.

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

It can be written as a sum of positive squares in 2 ways, for example, as 54316900 + 56085121 = 7370^2 + 7489^2 .

It is a cyclic number.

It is not a de Polignac number, because 110402021 - 2⁶ = 110401957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 110401993 and 110402011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110402051) 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, 1041476 + ... + 1041581.

It is an arithmetic number, because the mean of its divisors is an integer number (28121283).

Almost surely, 2^110402021 is an apocalyptic number.

It is an amenable number.

110402021 is a deficient number, since it is larger than the sum of its proper divisors (2083111).

110402021 is an equidigital number, since it uses as much as digits as its factorization.

110402021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2083110.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 110402021 is about 10507.2366015047. The cubic root of 110402021 is about 479.7249885876.

Adding to 110402021 its reverse (120204011), we get a palindrome (230606032).

It can be divided in two parts, 110 and 402021, that multiplied together give a triangular number (44222310 = T₉₄₀₄).

The spelling of 110402021 in words is "one hundred ten million, four hundred two thousand, twenty-one".