21003103210220 has 24 divisors (see below), whose sum is σ = 44109493311408. Its totient is φ = 8400674318400.

The previous prime is 21003103210171. The next prime is 21003103210267. The reversal of 21003103210220 is 2201230130012.

It is a super-2 number, since 2×21003103210220² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35131526 + ... + 35724365.

It is an arithmetic number, because the mean of its divisors is an integer number (1837895554642).

Almost surely, 2^{21003103210220} is an apocalyptic number.

21003103210220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21003103210220 is an abundant number, since it is smaller than the sum of its proper divisors (23106390101188).

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

21003103210220 is a wasteful number, since it uses less digits than its factorization.

21003103210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70870721 (or 70870719 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21003103210220 its reverse (2201230130012), we get a palindrome (23204333340232).

The spelling of 21003103210220 in words is "twenty-one trillion, three billion, one hundred three million, two hundred ten thousand, two hundred twenty".