21103010 has 32 divisors (see below), whose sum is σ = 40065840. Its totient is φ = 7990528.

The previous prime is 21103003. The next prime is 21103021. The reversal of 21103010 is 1030112.

It can be written as a sum of positive squares in 8 ways, for example, as 18037009 + 3066001 = 4247^2 + 1751^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14684 + ... + 16056.

Almost surely, 2^21103010 is an apocalyptic number.

21103010 is a deficient number, since it is larger than the sum of its proper divisors (18962830).

21103010 is a wasteful number, since it uses less digits than its factorization.

21103010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 21103010 is about 4593.8012582174. The cubic root of 21103010 is about 276.3427880466.

Adding to 21103010 its reverse (1030112), we get a palindrome (22133122).

The spelling of 21103010 in words is "twenty-one million, one hundred three thousand, ten".