21113010 has 24 divisors (see below), whose sum is σ = 54894060. Its totient is φ = 5630112.

The previous prime is 21112999. The next prime is 21113017. The reversal of 21113010 is 1031112.

It can be written as a sum of positive squares in 2 ways, for example, as 20985561 + 127449 = 4581^2 + 357^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 21112983 and 21113001.

It is not an unprimeable number, because it can be changed into a prime (21113017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117205 + ... + 117384.

Almost surely, 2^21113010 is an apocalyptic number.

21113010 is an abundant number, since it is smaller than the sum of its proper divisors (33781050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21113010 is a wasteful number, since it uses less digits than its factorization.

21113010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234602 (or 234599 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 21113010 is about 4594.8895525355. The cubic root of 21113010 is about 276.3864309755.

Adding to 21113010 its reverse (1031112), we get a palindrome (22144122).

The spelling of 21113010 in words is "twenty-one million, one hundred thirteen thousand, ten".