21221031020302 has 8 divisors (see below), whose sum is σ = 31832347060800. Its totient is φ = 10610248666704.

The previous prime is 21221031020257. The next prime is 21221031020351. The reversal of 21221031020302 is 20302013012212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21221031020302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133322302 + ... + 133481377.

It is an arithmetic number, because the mean of its divisors is an integer number (3979043382600).

Almost surely, 2^{21221031020302} is an apocalyptic number.

21221031020302 is a deficient number, since it is larger than the sum of its proper divisors (10611316040498).

21221031020302 is a wasteful number, since it uses less digits than its factorization.

21221031020302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266843450.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21221031020302 its reverse (20302013012212), we get a palindrome (41523044032514).

The spelling of 21221031020302 in words is "twenty-one trillion, two hundred twenty-one billion, thirty-one million, twenty thousand, three hundred two".