21120302 has 32 divisors (see below), whose sum is σ = 38195712. Its totient is φ = 8563104.

The previous prime is 21120283. The next prime is 21120311. The reversal of 21120302 is 20302112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34148 + ... + 34760.

It is an arithmetic number, because the mean of its divisors is an integer number (1193616).

Almost surely, 2^21120302 is an apocalyptic number.

21120302 is a deficient number, since it is larger than the sum of its proper divisors (17075410).

21120302 is a wasteful number, since it uses less digits than its factorization.

21120302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 21120302 is about 4595.6829742705. The cubic root of 21120302 is about 276.4182467117.

Adding to 21120302 its reverse (20302112), we get a palindrome (41422414).

The spelling of 21120302 in words is "twenty-one million, one hundred twenty thousand, three hundred two".