21134012 has 6 divisors (see below), whose sum is σ = 36984528. Its totient is φ = 10567004.

The previous prime is 21133979. The next prime is 21134021. The reversal of 21134012 is 21043112.

It is a super-2 number, since 2×21134012² = 893292926432288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2641748 + ... + 2641755.

It is an arithmetic number, because the mean of its divisors is an integer number (6164088).

Almost surely, 2^21134012 is an apocalyptic number.

It is an amenable number.

21134012 is a deficient number, since it is larger than the sum of its proper divisors (15850516).

21134012 is a wasteful number, since it uses less digits than its factorization.

21134012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5283507 (or 5283505 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 21134012 is about 4597.1743495325. The cubic root of 21134012 is about 276.4780450114.

Adding to 21134012 its reverse (21043112), we get a palindrome (42177124).

The spelling of 21134012 in words is "twenty-one million, one hundred thirty-four thousand, twelve".