21021444302 has 8 divisors (see below), whose sum is σ = 31534002696. Its totient is φ = 10510110072.

The previous prime is 21021444287. The next prime is 21021444307. The reversal of 21021444302 is 20344412012.

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

It is a super-2 number, since 2×21021444302² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021444307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261833 + ... + 332564.

It is an arithmetic number, because the mean of its divisors is an integer number (3941750337).

Almost surely, 2^21021444302 is an apocalyptic number.

21021444302 is a deficient number, since it is larger than the sum of its proper divisors (10512558394).

21021444302 is a wasteful number, since it uses less digits than its factorization.

21021444302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612082.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21021444302 its reverse (20344412012), we get a palindrome (41365856314).

The spelling of 21021444302 in words is "twenty-one billion, twenty-one million, four hundred forty-four thousand, three hundred two".