21221311320302 has 32 divisors (see below), whose sum is σ = 34497137109600. Its totient is φ = 9751744493568.

The previous prime is 21221311320289. The next prime is 21221311320329. The reversal of 21221311320302 is 20302311312212.

It is a super-4 number, since 4×21221311320302⁴ (a number of 54 digits) contains 4444 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 (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3819524 + ... + 7551912.

It is an arithmetic number, because the mean of its divisors is an integer number (1078035534675).

Almost surely, 2^{21221311320302} is an apocalyptic number.

21221311320302 is a deficient number, since it is larger than the sum of its proper divisors (13275825789298).

21221311320302 is a wasteful number, since it uses less digits than its factorization.

21221311320302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3736340.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21221311320302 its reverse (20302311312212), we get a palindrome (41523622632514).

The spelling of 21221311320302 in words is "twenty-one trillion, two hundred twenty-one billion, three hundred eleven million, three hundred twenty thousand, three hundred two".