21012302 has 8 divisors (see below), whose sum is σ = 31590000. Its totient is φ = 10482304.

The previous prime is 21012301. The next prime is 21012307. The reversal of 21012302 is 20321012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10802 + ... + 12597.

It is an arithmetic number, because the mean of its divisors is an integer number (3948750).

Almost surely, 2^21012302 is an apocalyptic number.

21012302 is a deficient number, since it is larger than the sum of its proper divisors (10577698).

21012302 is a wasteful number, since it uses less digits than its factorization.

21012302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23850.

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

The square root of 21012302 is about 4583.9177566793. The cubic root of 21012302 is about 275.9462805903.

Adding to 21012302 its reverse (20321012), we get a palindrome (41333314).

The spelling of 21012302 in words is "twenty-one million, twelve thousand, three hundred two".