21213031103320 has 64 divisors (see below), whose sum is σ = 55878228302400. Its totient is φ = 7095648030720.

The previous prime is 21213031103293. The next prime is 21213031103377. The reversal of 21213031103320 is 2330113031212.

It is a junction number, because it is equal to n+sod(n) for n = 21213031103291 and 21213031103300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 923901025 + ... + 923923984.

It is an arithmetic number, because the mean of its divisors is an integer number (873097317225).

Almost surely, 2^{21213031103320} is an apocalyptic number.

21213031103320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21213031103320 is an abundant number, since it is smaller than the sum of its proper divisors (34665197199080).

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

21213031103320 is a wasteful number, since it uses less digits than its factorization.

21213031103320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847825068 (or 1847825064 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21213031103320 its reverse (2330113031212), we get a palindrome (23543144134532).

The spelling of 21213031103320 in words is "twenty-one trillion, two hundred thirteen billion, thirty-one million, one hundred three thousand, three hundred twenty".