21203333013220 has 12 divisors (see below), whose sum is σ = 44526999327804. Its totient is φ = 8481333205280.

The previous prime is 21203333013211. The next prime is 21203333013229. The reversal of 21203333013220 is 2231033330212.

It is an interprime number because it is at equal distance from previous prime (21203333013211) and next prime (21203333013229).

It can be written as a sum of positive squares in 2 ways, for example, as 8477461145664 + 12725871867556 = 2911608^2 + 3567334^2 .

It is not an unprimeable number, because it can be changed into a prime (21203333013229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530083325311 + ... + 530083325350.

It is an arithmetic number, because the mean of its divisors is an integer number (3710583277317).

Almost surely, 2^{21203333013220} is an apocalyptic number.

21203333013220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21203333013220 is an abundant number, since it is smaller than the sum of its proper divisors (23323666314584).

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

21203333013220 is a wasteful number, since it uses less digits than its factorization.

21203333013220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060166650670 (or 1060166650668 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 21203333013220 its reverse (2231033330212), we get a palindrome (23434366343432).

The spelling of 21203333013220 in words is "twenty-one trillion, two hundred three billion, three hundred thirty-three million, thirteen thousand, two hundred twenty".