21220201303312 has 20 divisors (see below), whose sum is σ = 44851789118736. Its totient is φ = 9645546046880.

The previous prime is 21220201303283. The next prime is 21220201303349. The reversal of 21220201303312 is 21330310202212.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60284662618 + ... + 60284662969.

Almost surely, 2^{21220201303312} is an apocalyptic number.

21220201303312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21220201303312 is an abundant number, since it is smaller than the sum of its proper divisors (23631587815424).

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

21220201303312 is a wasteful number, since it uses less digits than its factorization.

21220201303312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120569325606 (or 120569325600 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21220201303312 its reverse (21330310202212), we get a palindrome (42550511505524).

The spelling of 21220201303312 in words is "twenty-one trillion, two hundred twenty billion, two hundred one million, three hundred three thousand, three hundred twelve".