21322101301220 has 48 divisors (see below), whose sum is σ = 44867538817920. Its totient is φ = 8511487186176.

The previous prime is 21322101301181. The next prime is 21322101301223. The reversal of 21322101301220 is 2210310122312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21322101301192 and 21322101301201.

It is not an unprimeable number, because it can be changed into a prime (21322101301223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87983576 + ... + 88225584.

It is an arithmetic number, because the mean of its divisors is an integer number (934740392040).

Almost surely, 2^{21322101301220} is an apocalyptic number.

21322101301220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21322101301220 is an abundant number, since it is smaller than the sum of its proper divisors (23545437516700).

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

21322101301220 is a wasteful number, since it uses less digits than its factorization.

21322101301220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250964 (or 250962 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21322101301220 its reverse (2210310122312), we get a palindrome (23532411423532).

The spelling of 21322101301220 in words is "twenty-one trillion, three hundred twenty-two billion, one hundred one million, three hundred one thousand, two hundred twenty".