21220302310320 has 40 divisors (see below), whose sum is σ = 65782937162736. Its totient is φ = 5658747282688.

The previous prime is 21220302310313. The next prime is 21220302310351. The reversal of 21220302310320 is 2301320302212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44208962907 + ... + 44208963386.

Almost surely, 2^{21220302310320} is an apocalyptic number.

21220302310320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220302310320 is an abundant number, since it is smaller than the sum of its proper divisors (44562634852416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21220302310320 is a wasteful number, since it uses less digits than its factorization.

21220302310320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88417926309 (or 88417926303 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21220302310320 its reverse (2301320302212), we get a palindrome (23521622612532).

The spelling of 21220302310320 in words is "twenty-one trillion, two hundred twenty billion, three hundred two million, three hundred ten thousand, three hundred twenty".