21301012 has 12 divisors (see below), whose sum is σ = 37398816. Its totient is φ = 10615640.

The previous prime is 21300997. The next prime is 21301031. The reversal of 21301012 is 21010312.

It is a super-2 number, since 2×21301012² = 907466224448288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21301012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7318 + ... + 9805.

It is an arithmetic number, because the mean of its divisors is an integer number (3116568).

Almost surely, 2^21301012 is an apocalyptic number.

It is an amenable number.

21301012 is a deficient number, since it is larger than the sum of its proper divisors (16097804).

21301012 is a wasteful number, since it uses less digits than its factorization.

21301012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17438 (or 17436 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 21301012 is about 4615.3019402852. The cubic root of 21301012 is about 277.2043741896.

Adding to 21301012 its reverse (21010312), we get a palindrome (42311324).

The spelling of 21301012 in words is "twenty-one million, three hundred one thousand, twelve".